MDEV-19933: Sync mariadb-common and update-alternatives based /etc/mysql/

Split the big my.cnf into multiple smaller files with the same filenames
and contents as official Debian/Ubuntu packaging has.

The config contents stays the same apart from following additions
which the original MariaDB upstream configs had and probably needs
to be kept:
- lc-messages=en_US and skip-external-locking in server config

Configs the original MariaDB upstream had that are seemingly
unnecessary and thus removed:
- port=3306 removed from the client config
- log_warnings=2 removed from server config

Also adopt update-alternatives system using
mysql-common/configure-symlinks. This way it is aligned with
downstream Debian/Ubuntu packaging.

1 files changed, 3 insertions, 4 deletions

diff --git a/debian/control b/debian/control
index c0132f07dce..71feb204fbd 100644
--- a/debian/control
+++ b/debian/control
@@ -230,16 +230,15 @@ Description: MariaDB database common files (e.g. /etc/mysql/my.cnf)
 
 Package: mariadb-common
 Architecture: all
-Depends: mysql-common,
+Depends: mysql-common (>= 5.6.25),
          ${misc:Depends}
-Description: MariaDB database common files (e.g. /etc/mysql/conf.d/mariadb.cnf)
+Description: MariaDB common configuration files
  MariaDB is a fast, stable and true multi-user, multi-threaded SQL database
  server. SQL (Structured Query Language) is the most popular database query
  language in the world. The main goals of MariaDB are speed, robustness and
  ease of use.
  .
- This package includes files needed by all versions of the client library
- (e.g. /etc/mysql/conf.d/mariadb.cnf).
+ This package includes configuration files common to all MariaDB programs.
 
 Package: mariadb-client-core-10.5
 Architecture: any