* gnu/services/databases.scm (mysql-configuration): Add datadir property.
* gnu/services/databases.scm (mysql-configuration-file): Replace hard coded
data dir with property from config.
* gnu/services/databases.scm (%mysql-activation): Remove activation, it runs
before PID 1. The data dir may reside on a file system not mounted at this
time.
* gnu/services/databases.scm (mysql-install-shepherd-service): Create service
which replaces the activation. Provide mysql-install.
* gnu/services/databases.scm (mysql-shepherd-service): Move invocation of
mysqld to mysql-start program-file, because the invocation gotten more
complex. Require mysql-install.
* gnu/services/databases.scm (mysql-start): Invoke mysqld only if a lock file
appears.
* gnu/services/databases.scm (mysql-shepherd-services): Prepend the install
service before the normal service.
* gnu/services/databases.scm (mysql-upgrade-wrapper): Increase timeout to
20s to let the mysql install procedure finish.
Signed-off-by: Marius Bakke <marius@gnu.org>