MariaDB Connector/C

https://mariadb.com/kb/en/mariadb-connector-c-release-notes/
https://downloads.mariadb.com/Connectors/c/

configs/ generated like this:

cmake -DWITH_CURL=OFF -DWITH_SSL=OFF -DWITH_UNIT_TESTS=OFF -DWITH_DYNCOL=OFF .../workdir/UnpackedTarball/mariadb-connector-c/
