[Maria-developers] Please review: MDEV-7824 [Bug #68041] Zero date can be inserted in strict no-zero mode through a default value

Hi Sergei, Please review a patch for mdev-7824. It's based on a MySQL patch for http://bugs.mysql.com/bug.php?id=68041 and is a blocker for: MDEV-3929 Add full support for auto-initialized/updated timestamp and datetime Thanks.