For Debian the rules file is the main makefile and assuming that a upstream
makefile will mangle the Debian packaging files creates false alerts
from static analysis tools and other problems.

Also each package has it's own maintainer scripts to install and
uninstall them.

There is no need for a separate mariadb-test metapackage and a versioned
mariadb-test-* package. Simply make it versionless and make it depend on
the client and server packages that stem from same source version.

These changes update the contents and behaviour of current packages
to match the current packaging in Debian official repos.

Keep mtr test scope small.

Updating maintainer scripts also required regenerating the translations.

Rules based on modern dh_* buildtools.

Update control file with new Debian conventions:
- Provide virtual-mysql-* virtual packages
- Recommends perl modules instead of Depends

Compat level needs to match the debhelper version in Debian.
Debian wheezy has 9, so there is no need to stay on ancient level 5.

made in 227510e0.
We now use lex->last_field->interval_list directly instead.

        Item_bool fixed to behave smarter with NOT operation.

MDEV-11039 - Add new scheduling algorithm for reducing tail latencies (for 10.2)

        strings/json_lib.c added as a JSON library.
        SQL frunction added with sql/item_jsonfunc.h/cc

Rebase