Remove from default configuration options that are compiled in like
default paths and character set. On the other hand add few examples of
tweak options that might be handy.

Signed-off-by: Michal Hrusecky <michal.hrusecky@turris.com>

The raison d'être of package mariadb-common was to provide common my.cnf
config file that was being used to include subdirectories and then to
push utf-8 as default everywhere. Let's make this file part of the
server package as there we actually set other options as well and drop
it from all clients. Instead let's set utf-8 as default in server,
client and client libraries. While at it also set socket to the more
common path and drop mysqld_safe script from the list of configuration
files and do other minor tweaks.

Signed-off-by: Michal Hrusecky <michal.hrusecky@turris.com>

Until now $(INSTALL_CONF) is used for configuration files that go into
/etc/mysql. This commit replaces that with $(INSTALL_DATA). The
configuration files are not only parsed by the server, but also by the
clients (which can be anybody).

This also removes a comment about a cron job from one of the
configuration files. There is no cron job.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

This way when only wanting the library nobody needs to download and
compile the server package, saving space and time. Also this way we can
avoid sudden SONAME bumps during a server upgrade.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

This moves mariadb-common into its own (tiny) package in preparation for
moving out libmariadb as well. Otherwise the library would have a
dependency on the big mariadb package.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

Does away with /etc/default/mysqld, introduces uci configuration
instead. The init script receives some further brushing up, like a
function (copied from Debian) to get mysqld configuration parameters
easily and quickly.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

At present there are some flaws related to configuration, also related
to the packaging of mariadb. For starters there are complaints that the
configuration is too static.

To address this a new configuration layout is introduced. The primary
configuration file (my.cnf) is changed so that it now only includes
further configuration files in the directory /etc/mysql/conf.d. More
default configuration files are added for the server and the client.
This is the new default configuration.

With these changes it's possible for the user to select if they want to
change the default configuration (in conf.d/*.cnf) or if they want to
drop their own files into conf.d instead. If the user .cnf files are
read after the default .cnf files (files are included in alphabetical
order), they will overwrite the settings from the default configuration.

The other flaw is that the my.cnf file is included in mariadb-server.
But that doesn't really fit the requirements, as the client also uses
the configuration file(s). To accomodate this a new package
mariadb-common is added. It installs the shared my.cnf file.

The remaining changes add base packages, both for the server and the
client. These are meant as foundation for the packages containing the
respective binaries. In summary they will install the configuration,
small miscellaneous files (SQL scripts etc.) and the user "mariadb".

That means that everything is ready for the binaries, like mysql and
mysqld. If there is not enough space left on flash memory, the user can
just drop the binaries on a pendrive, link them to /usr/bin and get
started.

The ideas and configuration files were copied from Debian. Some
amendments were made.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

Also create a user "mariadb" and use it for running the server. And
add possibility to easily add command line args.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

MariaDB is a drop-in replacement for MySQL. This commit adds a current
and stable version of MariaDB to the tree.

Quite a few ideas/patches were copied from Alpine Linux, Busybox Buildroot
and Debian.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>