doc: Update htmlxref.cnf.

* doc/htmlxref.cnf: Update from Texinfo.  Add entries for "mes",
"guix.ru", and "guix.zh_CN".

doc/htmlxref.cnf

@@ -1,9 +1,9 @@
 # htmlxref.cnf - reference file for free Texinfo manuals on the web.
 # Modified by Ludovic Courtès <ludo@gnu.org> for the GNU Guix manual.
 
-htmlxrefversion=2019-05-04.20; # UTC
+htmlxrefversion=2020-01-11.22; # UTC
 
-# Copyright 2010, 2011, 2012, 2013, 2014, 2015, 2019 Free Software Foundation, Inc.
+# Copyright 2010, 2011, 2012, 2013, 2014, 2015, 2019, 2020 Free Software Foundation, Inc.
 # 
 # Copying and distribution of this file, with or without modification,
 # are permitted in any medium without royalty provided the copyright
@@ -68,12 +68,12 @@ autogen		node	${GS}/autoconf/manual/html_node/
 automake	mono	${GS}/automake/manual/automake.html
 automake	node	${GS}/automake/manual/html_node/
 
-avl		node	http://www.stanford.edu/~blp/avl/libavl.html/
+avl		node	http://adtinfo.org/libavl.html/
 
 bash		mono	${GS}/bash/manual/bash.html
 bash		node	${GS}/bash/manual/html_node/
 
-BINUTILS = http://sourceware.org/binutils/docs
+BINUTILS = https://sourceware.org/binutils/docs
 binutils	node	${BINUTILS}/binutils/
  as		node	${BINUTILS}/as/
  bfd		node	${BINUTILS}/bfd/
@@ -110,13 +110,15 @@ cpio		node	${GS}/cpio/manual/html_node/
 
 cssc		node	${GS}/cssc/manual/
 
-#cvs cannot be handled here; see http://ximbiot.com/cvs/manual.
+CVS = ${GS}/trans-coord/manual
+cvs            mono    ${CVS}/cvs/cvs.html
+cvs            node    ${CVS}/cvs/html_node/
 
 ddd		mono	${GS}/ddd/manual/html_mono/ddd.html
 
 ddrescue	mono	${GS}/ddrescue/manual/ddrescue_manual.html
 
-DICO = http://puszcza.gnu.org.ua/software/dico/manual
+DICO = https://puszcza.gnu.org.ua/software/dico/manual
 dico		mono	${DICO}/dico.html
 dico		chapter	${DICO}/html_chapter/
 dico		section	${DICO}/html_section/
@@ -167,6 +169,9 @@ emacs		node	${EMACS}/html_node/emacs/
  eshell		mono	${EMACS}/html_mono/eshell.html
  eshell		node	${EMACS}/html_node/eshell/
  #
+ eww		mono	${EMACS}/html_mono/eww.html
+ eww		node	${EMACS}/html_node/eww/
+ #
  flymake	mono	${EMACS}/html_mono/flymake.html
  flymake	node	${EMACS}/html_node/flymake/
  #
@@ -234,8 +239,7 @@ find		node	${GS}/findutils/manual/html_node/find_html
 findutils	mono	${GS}/findutils/manual/html_mono/find.html
 findutils	node	${GS}/findutils/manual/html_node/find_html
 
-FLEX = http://flex.sourceforge.net
-flex		node	${FLEX}/manual/
+flex		node	https://westes.github.io/flex/manual/
 
 gama		mono	${GS}/gama/manual/gama.html
 gama		node	${GS}/gama/manual/html_node/
@@ -249,7 +253,7 @@ gawk		node	${GAWK}/html_node/
 gcal		mono	${GS}/gcal/manual/gcal.html
 gcal		node	${GS}/gcal/manual/html_node/
 
-GCC = http://gcc.gnu.org/onlinedocs
+GCC = https://gcc.gnu.org/onlinedocs
 gcc		node	${GCC}/gcc/
  cpp		node	${GCC}/cpp/
  gcj		node	${GCC}/gcj/
@@ -265,7 +269,7 @@ gcc		node	${GCC}/gcc/
  gnat-style	node	${GCC}/gnat-style/
  libiberty	node	${GCC}/libiberty/
 
-GDB = http://sourceware.org/gdb/current/onlinedocs
+GDB = https://sourceware.org/gdb/current/onlinedocs
 gdb		node	${GDB}/gdb/
  stabs		node	${GDB}/stabs/
 
@@ -282,13 +286,13 @@ geiser		chapter	http://geiser.nongnu.org/
 gettext		mono	${GS}/gettext/manual/gettext.html
 gettext		node	${GS}/gettext/manual/html_node/
 
-gforth		node	http://www.complang.tuwien.ac.at/forth/gforth/Docs-html/
+gforth		node	https://www.complang.tuwien.ac.at/forth/gforth/Docs-html/
 
 global		mono	${GS}/global/manual/global.html
 
 gmediaserver	node	${GS}/gmediaserver/manual/
 
-gmp		node	http://www.gmplib.org/manual/
+gmp		node	https://www.gmplib.org/manual/
 
 gnu-arch	node	${GS}/gnu-arch/tutorial/
 
@@ -311,7 +315,7 @@ gnun		node	${GNUN}/gnun/html_node/
  web-trans	mono	${GNUN}/web-trans/web-trans.html
  web-trans	node	${GNUN}/web-trans/html_node/
 
-GNUPG = http://www.gnupg.org/documentation/manuals
+GNUPG = https://www.gnupg.org/documentation/manuals
 gnupg		node	${GNUPG}/gnupg/
  dirmngr	node	${GNUPG}/dirmngr/
  gcrypt		node	${GNUPG}/gcrypt/
@@ -399,6 +403,10 @@ guix.es		mono	${GS}/guix/manual/es/guix.html
 guix.es		node	${GS}/guix/manual/es/html_node/
 guix.fr		mono	${GS}/guix/manual/fr/guix.html
 guix.fr		node	${GS}/guix/manual/fr/html_node/
+guix.ru		mono	${GS}/guix/manual/ru/guix.html
+guix.ru		node	${GS}/guix/manual/ru/html_node/
+guix.zh_CN	mono	${GS}/guix/manual/zh-cn/guix.html
+guix.zh_CN	node	${GS}/guix/manual/zh-cn/html_node/
 guix		mono	${GS}/guix/manual/en/guix.html
 guix		node	${GS}/guix/manual/en/html_node/
 
@@ -499,6 +507,9 @@ METAEXCHANGE = http://ftp.gwdg.de/pub/gnu2/iwfmdh/doc/texinfo
  iwf_mh		node	${METAEXCHANGE}/iwf_mh.html
  scantest	node	${METAEXCHANGE}/scantest.html
 
+mes		mono	${GS}/mes/manual/mes.html
+mes		node	${GS}/mes/manual/html_node/
+
 MIT_SCHEME = ${GS}/mit-scheme/documentation
  mit-scheme-ref	  node	${MIT_SCHEME}/mit-scheme-ref/
  mit-scheme-user  node	${MIT_SCHEME}/mit-scheme-user/
@@ -515,9 +526,9 @@ mpfr		mono	http://www.mpfr.org/mpfr-current/mpfr.html
 
 mtools		mono	${GS}/mtools/manual/mtools.html
 
-myserver	node	http://www.myserverproject.net/documentation/
+myserver	mono	http://www.myserverproject.net/doc.php
 
-nano		mono	http://www.nano-editor.org/dist/latest/nano.html
+nano		mono	https://www.nano-editor.org/dist/latest/nano.html
 
 nettle		chapter	http://www.lysator.liu.se/~nisse/nettle/nettle.html
 
@@ -550,7 +561,7 @@ pspp		node	${GS}/pspp/manual/html_node/
 pyconfigure	mono	${GS}/pyconfigure/manual/pyconfigure.html
 pyconfigure	node	${GS}/pyconfigure/manual/html_node/
 
-R = http://cran.r-project.org/doc/manuals
+R = https://cran.r-project.org/doc/manuals
  R-intro	mono	${R}/R-intro.html
  R-lang		mono	${R}/R-lang.html
  R-exts		mono	${R}/R-exts.html
@@ -656,7 +667,7 @@ xboard		node	${GS}/xboard/manual/html_node/
 # emacs-page
 # Free TeX-related Texinfo manuals on tug.org.
 
-T = http://tug.org/texinfohtml
+T = https://tug.org/texinfohtml
 
 dvipng		mono	${T}/dvipng.html
 dvips		mono	${T}/dvips.html