* gnu/services/databases.scm (mysql-configuration): Add extra-environment
(mysql-service): Use #:log-file and #:environment-variables
* doc/guix.texi: Document it.
Signed-off-by: Leo Prikler <leo.prikler@student.tugraz.at>
Fixes <https://bugs.gnu.org/46737>.
PostgreSQL running with a different socket directory to the default one in the
package itself breaks some services, this commit restores the previous
behaviour where PostgreSQL by default will run with a socket directory that
matches the default used by PostgreSQL packaged for Guix.
Switching to a different default value can happen, but only alongside changing
the PostgreSQL package.
* gnu/services/databases.scm (<postgresql-config-file>)[socket-directory]:
Change default to #false.
* doc/guix.texi (Database Services): Update documentation, and specify a
different value for disabling connections via sockets.
* gnu/tests/guix.scm (%guix-data-service-os): Use default PostgreSQL
behaviour.
* gnu/tests/monitoring.scm (%zabbix-os): Likewise.
* gnu/tests/web.scm (patchwork-os): Likewise.
Signed-off-by: Leo Famulari <leo@famulari.name>
Before this change, the 'gnu-build-system' phases were listed in the
"Build Systems" section, and then summarized in the "Build Phases"
section. This moves everything to "Build Phases".
* doc/guix.texi (Build Systems): Move phase table to...
(Build Phases): ... here. Rearrange surrounding text.
This allows importing packages with complicated version specific dependency
chains without the package symbol names colliding.
* doc/guix.texi (Invoking guix import): Document the --pin-versions option.
Mention that a specific version can be imported. Remove the experimental
warning.
* guix/import/go.scm (go-module->guix-package-name)[version]: Add optional
argument. Rewrite the character translation in terms of string-map.
(go-module->guix-package): Conditionally use dependencies whose symbol include
their version, based no the value of the PIN-VERSIONS? argument.
* guix/import/utils.scm (package->definition): Add a new case where the full
version string is appended to the package symbol.
* guix/scripts/import.scm (guix-import): Correctly print forms starting
with '(define-public [...]'.
* guix/scripts/import/go.scm (guix-import-go): Conditionally include the
version in the package symbols defined.
Otherwise, the shell tries to perform pattern-matching based on the "?"
character.
Reported by nij in #guix.
* doc/guix.texi (Binary Installation): Add quotes around OPENPGP-SIGNING-KEY-URL.
This updater currently covers 2.4% of the packages.
* guix/gnu-maintenance.scm (latest-sourceforge-release): New procedure.
(%sourceforge-updater): New variable.
* doc/guix.texi (Invoking guix refresh): Document it.
The previous instructions were correct, but we got too many bug reports
with a root cause of "did not build Guix yet".
Other parts of the manual already instruct `make && make check`, so this
makes the treatment of building Guix more consistent, too.
* doc/contributing.texi (Building from Git): Instruct the user to run
`make` when building Guix.
That way, the default config with (advertises? #t) and without a cache
will offer zstd-compressed substitutes, which should lead to much higher
throughput than gzip.
* gnu/services/base.scm (default-compression): When
'guix-publish-configuration-cache' returns true, use higher level
compression ratios. Add "zstd".
* doc/guix.texi (Base Services): Mention zstd.
With this change, each substitute occupies a single line of
output (instead of two) when using '-v1', the default for 'guix package'
& co.
* guix/status.scm (print-build-event): Add #:print-urls? and honor it.
(print-build-event/quiet): Pass #:print-urls? #f.
(print-build-event/quiet-with-urls): New procedure.
(logger-for-level): Add case for LEVEL 2.
* doc/guix.texi (Common Build Options): Adjust '--verbosity'
documentation.
This is no longer needed as the Cuirass specification mechanism has been
rewritten.
* doc/guix.texi (Continuous Integration): Remove Simple Cuirass section.
* gnu/packages/julia-xyz.scm (julia-jllwrappers): New variable.
* doc/guix.texi (julia-build-system): Document how to use jllwrappers to use
to guix binary packages.
Co-authored-by: Ludovic Courtès <ludo@gnu.org>
This hotfix package is no longer necessary as the ability to parameterize the
way htmlprag tokenizes HTML was added in guile-lib 0.2.7.
* doc/build.scm (guile-lib/htmlprag-fixed): Remove variable.
(html-manual-identifier-index): Replace guile-lib/htmlprag-fixed by guile-lib,
and make set the %strict-tokenizer? parameter to #t.
(syntax-highlighted-html): Likewise.
For more context, see the discussion in <https://bugs.gnu.org/47111>.
* doc/contributing.texi (Commit Access): Add paragraph about removing
inactive committers.
References:
https://sysctl-explorer.net/fs/protected_hardlinks/https://sysctl-explorer.net/fs/protected_symlinks/
* gnu/services/sysctl.scm (%default-sysctl-settings): New public variable.
(<sysctl-configuration>): Use %default-sysctl-settings as the default value.
* gnu/services/base.scm (%base-services): Add sysctl-service-type.
* doc/guix.texi (Miscellaneous Services): Document the new defaults.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This brings total updater coverage, as reported by 'guix refresh
--list-updaters', from 78% to 88.3%. Among many other things, it covers
freedesktop.org packages.
* guix/gnu-maintenance.scm (html-updatable-package?)
(latest-html-updatable-release): New procedures.
(%generic-html-updater): New variable.
* doc/guix.texi (Invoking guix refresh): Document it.
Fixes <https://bugs.gnu.org/46803>.
Reported by Luis Felipe <luis.felipe.la@protonmail.com>.
* doc/guix.texi (Getting Started): Introduce the term "profile".
(Invoking guix package): Likewise.
mongodb 3.4.10 has unpatched CVEs and mongodb 3.4.24 has some files in the
release tarball under the SSPL, therefore we cannot provide mongodb while
upholding to good security standards.
It turns out feff80cec3 was right since while
the main license file wasnt altered to SSPL, some files in the tree contain
SSPL headers.
* gnu/packages/databases.scm (go-gopkg.in-mgo.v2): Remove.
* gnu/packages/databases.scm (mongo-tools): Remove.
* doc/guix.texi (mongodb-service-type): Remove.
* gnu/tests/databases.scm (%test-mongodb, %mongodb-os, run-mongodb-test):
Remove.
* gnu/services/databases.scm (mongodb-configuration, mongodb-configuration?,
mongodb-configuration-mongodb, mongodb-configuration-config-file,
mongodb-configuration-data-directory, mongodb-service-type,
%default-mongodb-configuration-file, %mongodb-accounts, mongodb-activation,
mongodb-shepherd-service): Remove.
* gnu/packages/databases.scm (mongodb): Remove.
Fixes <https://issues.guix.gnu.org/36117>.
Before this change, the 'binfmt_misc' entries registered for QEMU would not be
usable in container contexts outside of guix-daemon (without manually bind
mounting file names).
For example:
$ docker run --rm arm32v7/debian true
standard_init_linux.go:207: exec user process caused "no such file or directory"
After this change, any container can make use of the QEMU binfmt_misc
registrations, as their corresponding QEMU static binaries are fully
pre-loaded by the kernel.
* gnu/services/virtualization.scm (<qemu-platform>): Define using
'define-record-type*'.
[flags]: New field, which defaults to "F" (fix binary).
(%i386, %i486, %alpha, %arm, %armeb, %sparc, %sparc32plus, %ppc, %ppc64)
(%ppc64le, %m68k, %mips, %mipsel, %mipsn32, %mipsn32el, %mips64, %mips64el)
(%riscv32, %riscv64, %sh4, %sh4eb, %s390x, %aarch64, %hppa): Adjust.
(qemu-binfmt-guix-chroot): Remove variable.
(qemu-binfmt-service-type): Remove the qemu-binfmt-guix-chroot extension.
* gnu/services/qemu-binfmt (qemu-platform->binfmt): Use the static output of
QEMU.
* doc/contributing.texi (Submitting Patches): Update doc.
* doc/guix.texi (Virtualization Services): Update doc.
* gnu/services/guix.scm (guix-build-coordinator-agent-dynamic-auth-with-file,
guix-build-coordinator-agent-dynamic-auth-with-filen?,
guix-build-coordinator-agent-dynamic-auth-with-file-agent-name,
guix-build-coordinator-agent-dynamic-auth-with-file-token-file): New procedures.
(guix-build-coordinator-agent-shepherd-services): Handle new dynamic auth with
file record.
* doc/guix.texi (Guix Build Coordinator): Document the new dynamic auth with
file record.
A new authentication approach has been added to the coordinator, so to better
represent the options, this commit changes the configuration to accept
different records, each for different authentication approaches.
* gnu/services/guix.scm (guix-build-coordinator-agent-configuration-uuid,
guix-build-coordinator-agent-configuration-password,
guix-build-coordinator-agent-configuration-password-file): Removed
procedures.
(guix-build-coordinator-agent-password-auth,
guix-build-coordinator-agent-password-auth?,
guix-build-coordinator-agent-password-auth-uuid,
guix-build-coordinator-agent-password-auth-password,
guix-build-coordinator-agent-password-file-auth,
guix-build-coordinator-agent-password-file-auth?,
guix-build-coordinator-agent-password-file-auth-uuid,
guix-build-coordinator-agent-password-file-auth-password-file): New
procedures.
(guix-build-coordinator-agent-shepherd-services): Adjust to handle the
authentication field and it's possible record values.
* doc/guix.texi (Guix Build Coordinator): Update documentation.
* doc/guix.texi (sane-service-type): Move from between documentation
about geoclue, expand slightly.
(sane-backends-minimal): New description.
(sane-backends): New description, new example.
Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Instead of returning multiple services in simple-cuirass-services, rely on the
instantiate-missing-services procedure to instantiate postgresql and
postgresql-role-service-type when missing.
Turn simple-cuirass-services procedure into
simple-cuirass-configuration->specs, that takes a simple-cuirass-configuration
record and returns a Cuirass specification.
Suggested-by: Ludovic Courtès <ludo@gnu.org>
* gnu/services/cuirass.scm (%default-cuirass-config): Remove it.
(simple-cuirass-services): Rename it to ...
(simple-cuirass-configuration->specs): ... this procedure.
* gnu/tests/cuirass.scm (cuirass-services): Remove postgresql and
postgresql-role services that are automatically instantiated.
(simple-cuirass-service): New variable.
(%cuirass-simple-test): Adapt it to use simple-cuirass-configuration->specs
instead of simple-cuirass-services.
* doc/guix.texi (Simple Cuirass): Update it.
* gnu/services/cuirass.scm (<build-manifest>,
<simple-cuirass-configuration>): New records.
(build-manifest, build-manifest?, simple-cuirass-configuration,
simple-cuirass-configuration?, simple-cuirass-services): New procedures.
(%default-cuirass-config): New variable.
* gnu/tests/cuirass.scm (%cuirass-simple-test): New variable.
* doc/guix.texi (Continuous Integration): Document it.
* doc/guix.texi (Base Services)[pam-limits-service]: Add an example and
explanation of how the 'nofile', or open file descriptors value, can be
configured.
Remove the 'vm-image' command that has been superseded by the 'image'
command.
* gnu/system/vm.scm (system-qemu-image): Remove it.
* guix/scripts/system.scm (system-derivation-for-action): Mark 'vm-image'
command as deprecated and use the image API to produce the VM image.
(perform-action, show-help): Adapt accordingly.
* tests/guix-system.sh: Ditto.
* doc/guix.texi (Invoking guix system,
Running Guix in a VM): Ditto.
* etc/completion/fish/guix.fish: Ditto.
* etc/completion/zsh/_guix: Ditto.
* gnu/services/vpn.scm (wireguard-peer, wireguard-configuration): New records.
(wireguard-service-type): New variable.
* doc/guix.texi (VPN Services): Document it.
* gnu/services/web.scm (<agate-configuration>): New record type.
(agate-accounts, agate-shepherd-service): New procedures.
(agate-service-type): New variable.
* doc/guix.texi (Web Services): Document it.
Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>
* doc/guix.texi (Invoking guix environment): Explain how to exit and clean up
a Guix environment.
The current documentation doesn't explain how to exit an environment or how to
remove the packages after exiting.
Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>
* build-aux/test-driver.scm (script-version): Update.
(show-help): Document it.
(%options): Add the 'show-duration' option.
(test-runner-gnu): Pass as a new argument.
[test-cases-start-time]: New inner variable.
[test-on-test-begin-gnu]: New hook, used to record the start time.
[test-on-test-end-gnu]: Conditionally print elapsed time. Record it as the
optional metadata in the test result file (.trs).
* doc/guix.texi (Running the Test Suite): Document it.
* guix/scripts/package.scm (export-manifest): New procedure.
(show-help, %options): Add '--export-manifest'.
(process-query): Honor it.
* guix/build/profiles.scm (build-profile): Mention it.
* tests/guix-package.sh: Test it.
* doc/guix.texi (Invoking guix package): Document it.
* build-aux/test-driver.scm (show-help): Add the help text for the
new '--errors-only' option.
(%options): Add the errors-only option.
(test-runner-gnu): Add the errors-only? parameter and update doc. Move the
logging of the test data after the test has completed, so a choice can be made
whether to keep it or discard it based on the value of the test result.
(main): Pass the errors-only? option to the driver.
* doc/guix.texi (Running the Test Suite): Document the new option.
* build-aux/test-driver.scm (show-help): Add help text for the new --select
and --exclude options.
(%options): Add the new select and exclude options.
(test-runner-gnu): Pass them to the test runner. Update doc.
(test-match-name*, test-match-name*/negated, %test-match-all): New variables.
(main): Compute the test specifier based on the values of the new options and
apply it to the current test runner when running the test file.
* doc/guix.texi (Running the Test Suite): Document the new options.
* gnu/services/databases.scm (postgresql-configuration-log-directory): New
procedure.
(<postgresql-configuration>)[log-directory]: New field.
(postgresql-activation): Create the log directory.
(postgresql-shepherd-service): Honor it.
* gnu/tests/databases.scm (%postgresql-log-directory): New variable.
(log-file): New test case.
* doc/guix.texi (Database Services): Document it.
* gnu/services/databases.scm (postgresql-config-file-compiler): Support Guile
datatypes in the "extra-config" field.
* gnu/tests/databases.scm (%postgresql-os): Test it.
* doc/guix.texi (Database Services): Document it.
Reported by pineapples on #guix.
This is a followup to 8e1907a724.
* doc/guix.texi (Invoking guix package): Remove sentence that says that
package transformations are lost upon upgrading and explicitly say the
opposite.
* doc/contributing.texi: Replace link to TP with a link to Weblate.
* doc/guix.texi: Replace link to TP with a link to Weblate.
* doc/guix-cookbook.texi: Replace link to TP with a link to Weblate.
* gnu/services/virtualization.scm (qemu-binfmt-service-type)[guix-support?]:
Change the default from #f to #t.
* doc/guix.texi (Transparent Emulation with QEMU): Change the default of
‘guix-support?’ from #f to #t. Describe the implication of setting it to #f.
Co-authored-by: Ludovic Courtès <ludo@gnu.org>
* guix/scripts/publish.scm (compress-nar)[write-compressed-file]: New
procedure.
Use it for 'gzip' and 'lzip'. Add 'zstd.
(nar-response-port, string->compression-type): Add case for 'zstd'.
* tests/publish.scm (zstd-supported?): New procedure.
("/nar/zstd/*"): New test.
* doc/guix.texi (Invoking guix publish): Document zstd compression.
(Base Services): Add cross-reference to the above node.
* doc/contributing.texi (Running Guix Before It Is Installed): Instruct
user to run ./bootstrap before ./configure.
Signed-off-by: Jakub Kądziołka <kuba@kadziolka.net>
* gnu/services/mail.scm (radicale-configuration)
(radicale-configuration?): New procedures.
(%default-radicale-config-file)
(radicale-service-type): New variables.
* doc/guix.texi: Document it.
Suggested by Philippe Swartvagher <philippe.swartvagher@inria.fr>.
* guix/transformations.scm (transform-package-patches): New procedure.
(%transformations): Add it as 'with-patch'.
(%transformation-options, show-transformation-options-help/detailed):
Add '--with-patch'.
* tests/transformations.scm ("options->transformation, with-patch"): New
test.
* doc/guix.texi (Package Transformation Options): Document it.
This simplifies setup of build machines: no need to install Guile in
addition to Guix, no need to set 'GUILE_LOAD_PATH' & co., leading to
fewer failure modes.
* guix/ssh.scm (remote-run): New procedure.
(remote-daemon-channel): Use it instead of 'open-remote-pipe*'.
(store-import-channel)[import]: Remove check for module availability.
Add call to 'primitive-exit'.
Use 'remote-run' instead of 'open-remote-pipe'.
(store-export-channel)[export]: Remove check for module availability.
Add calls to 'primitive-exit'.
Use 'remote-run' instead of 'open-remote-pipe'.
(handle-import/export-channel-error): Remove 'module-error' clause.
(report-module-error): Remove.
* guix/scripts/offload.scm (assert-node-has-guix): Replace call to
'report-module-error' by 'leave'.
* doc/guix.texi (Daemon Offload Setup): Remove mention of Guile.
* guix/import/cran.scm (%input-style): New parameter.
(format-inputs): Use it.
* guix/scripts/import/cran.scm (guix-import-cran): Set the %input-style
parameter.
(%options): Add "--style" option.
* doc/guix.texi (Invoking guix import): Document it.
* guix/import/opam.scm (get-opam-repository): Add support for coq
repositories.
(ocaml-name->guix-name): Properly name coq package.
* doc/guix.texi (Invoking guix import): Document it.
There are plenty of options supported that the Guix configuration record
doesn't help you with, so add this field to allow users to do their own thing.
* gnu/services/monitoring.scm (<prometheus-node-exporter-configuration>): Add
extra-options field.
(prometheus-node-exporter-shepherd-service): Handle the extra options.
* doc/guix.texi (Prometheus Node Exporter Service): Document this.
* doc/guix.texi (Keyboard Layout and Networking and Partitioning): Add
F2FS to the footnote of Guix System's supported root file systems.
Signed-off-by: Tobias Geerinckx-Rice <me@tobias.gr>
It is a common mistake to modify an <origin> record that computes to a
fixed-output derivation, forgetting to update its hash field, only to find out
that a previously built source gets used instead. While there doesn't seem to
be an obvious solution to this problem, we can at least document the fact that
sources can be checked the same as other builds.
* doc/guix.texi (Additional Build Options): Document that source derivation
builds can be verified using --check.
* guix/scripts/processes.scm (lock->recutils): New procedure.
(daemon-session->recutils): Use it.
(daemon-sessions->recutils, session-key->recutils)
(session-scalars->normalized-record)
(child-process->normalized-record)
(daemon-sessions->normalized-record): New procedures.
(session-rec-type, lock-rec-type, child-process-rec-type)
(%available-formats): New variables.
(list-formats): New procedure.
(%options, show-help): Add '--format'.
(%default-options): New variable.
(guix-processes): Use 'parse-command-line' instead of 'args-fold*'.
Honor the 'format' value in OPTIONS.
* doc/guix.texi (Invoking guix processes): Document '--format'.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* guix/scripts/processes.scm (daemon-session->recutils): Put child
process information in separate fields.
* doc/guix.texi (Invoking guix processes): Document change in output of
'guix processes'.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* guix/scripts/publish.scm (%options): Add "--advertise" option.
(show-help): Document it.
(service-name): New procedure,
(publish-service-type): new variable.
(run-publish-server): Add "advertise?" and "port" parameters. Use them to publish
the server using Avahi.
(guix-publish): Pass the "advertise?" option to "run-publish-server".
* gnu/services/base.scm (<guix-publish-configuration>): Add "advertise?"
field.
(guix-publish-shepherd-service): Honor it.
* gnu/services/databases.scm (<mysql-configuration>): Add AUTO-UPGRADE? field.
(mysql-upgrade-wrapper, mysql-upgrade-shepherd-service,
mysql-shepherd-services): New variables.
(mysql-service-type): Use MYSQL-SHEPHERD-SERVICES instead of
MYSQL-SHEPHERD-SERVICE.
* doc/guix.texi (Database Services): Document the AUTO-UPGRADE? field of
MYSQL-SERVICE-TYPE.
* gnu/tests/databases.scm (run-mysql-test): Test that mysql_upgrade has run.
* gnu/services/databases.scm (mysql-service): Define in terms of DEFINE-DEPRECATED.
* gnu/tests/databases.scm (%mysql-os): Adjust accordingly.
* doc/guix.texi (Database Services): Adjust the MariaDB/MySQL section to
document MYSQL-SERVICE-TYPE instead of MYSQL-SERVICE. While at it, document
the EXTRA-CONTENT field.
‘escpr’ is nice and short, but everyone else calls this package
‘epson-inkjet-printer-escpr’. More importantly, so does upstream.
* gnu/packages/cups.scm (escpr, epson-inkjet-printer-escpr,): Rename
escpr to epson-inkjet-printer-escpr, redefining escpr as
deprecated-package. Adjust all users.
* gnu/services/vpn.scm (openvpn-client-configuration)
(openvpn-server-configuration): Make ca, key an cert fields optional.
* doc/guix.texi (VPN Services): Document the change.
And add a new '--volatile' option to have it volatile otherwise.
* guix/scripts/system.scm (%options)[volatile-root?]: New boolean option.
(%default-options): Set its default value to #f.
(show-help): Add help doc.
* guix/scripts/system.scm (perform-action): Propagate option...
(system-derivation-for-action): ...here. Use it to set the volatile-root?
field of the image object passed to SYSTEM-IMAGE.
* doc/guix.texi (Invoking guix system): Document it.
Following discussions in <https://issues.guix.gnu.org/43893>, keeping a copy
of the updated package source is desirable when generating a release.
* build-aux/update-guix-package.scm (version-controlled?): Remove variable.
(call-with-temporary-git-worktree): Renamed from
'with-temporary-git-worktree'. Update doc. Do not change directory
implicitly. Define as a procedure, not a syntax.
(keep-source-in-store): New procedure.
(main): Adjust to use with call-with-temporary-git-worktree. Add the sources
to the store when GUIX_ALLOW_ME_TO_USE_PRIVATE_COMMIT is set. Exit gracefully
when FIND-ORIGIN-REMOTE returns #f.
(%savannah-guix-git-repo-push-url-regexp): Adjust match for a potential colon
separator.
* Makefile.am (GUIX_ALLOW_ME_TO_USE_PRIVATE_COMMIT): Adjust.
* .dir-locals.el (scheme-mode): Remove entry for with-temporary-git-worktree.
* doc/contributing.texi (Updating the Guix Package): Update doc.
Co-authored-by: Ludovic Courtès <ludo@gnu.org>
Also change the default configuration to clear on logout, which is the
upstream default.
* gnu/services/base.scm (<mingetty-configuration>): Add 'clear-on-logout?'
field.
(mingetty-shepherd-service): Pass the "--noclear" option to mingetty only if
'clear-on-logout?' is #false.
* doc/guix.texi (Base Services): Document the 'clear-on-logout?' field.
This is a followup to ecaa102a58.
* gnu/services/base.scm (<guix-publish-configuration>)[cache-bypass-threshold]:
New field.
(guix-publish-shepherd-service): Honor it.
* gnu/services/base.scm (swap-service-type)[device-lookup, device-name]:
New variables.
Add 'modules' field to 'shepherd-service'. In 'start' and 'stop', use
'device-lookup' to resolve UUIDs and labels.
* doc/guix.texi (operating-system Reference): Adjust accordingly.
* doc/guix.texi (Top): Add end of line period to menu entry in the node listing.
(Invoking guix time-machine): Remove duplicate word.
(Invoking guix environment): As above.
(PAM Mount Service): As above.
(Running Guix in a Virtual Machine): Remove erroneous hyphen and duplicate word.
Signed-off-by: Leo Famulari <leo@famulari.name>
* gnu/services/web.scm (<gmnisrv-configuration>): New record type.
(%default-gmnisrv-config-file): New variable.
(%gmnisrv-accounts, %gmnisrv-activation): New variables.
(gmnisrv-shepherd-service): New procedure.
(gmnisrv-service-type): New variable.
* doc/guix.texi (Web Services): Document it.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* doc/local.mk (xref_command): Wrap loop body in 'if [ -n "$$e" ]'.
This avoids shell syntax errors when producing
doc/guix-cookbook.de.texi, which for some reason gets an empty 'e' at
one point. Quote the first argument to 'head'.
* doc/guix.texi (Getting Substitutes from Other Servers): New node.
(Invoking guix-daemon): Add cross-reference.
(Substitute Server Authorization): Clarify that this is unnecessary on
Guix System.
(Invoking guix publish): Add cross-reference.
