Add sql_mode to SQL Configuration

In a perfect world, we wouldn't need to allow imperfect MySQL queries, but unfortunately most of us are in the business of supporting dated software.

The new SQL Configuration panel is fantastic and adds all the key settings from /etc/my.conf EXCEPT sql_mode.

This could be presented as either a text field with a link to the MySQL documentation or granular checkboxes. For example:

• NO_ENGINE_SUBSTITUTION
• NO_ZERO_DATE