joschiwald c2aead1da5 DB: Made timestamp columns, those can have no date, nullable instead of saving invalid date '0000-00-00 00:00:00' ...

* This makes our tables mysql strict mode conform

Ref #21113

2018-01-02 20:55:57 +01:00

..

master

DB: Made timestamp columns, those can have no date, nullable instead of saving invalid date '0000-00-00 00:00:00'

2018-01-02 20:55:57 +01:00