forked from GNUsocial/gnu-social
		
	On PostgreSQL:
  - Parse defaults for strings and booleans properly.
  - Parse the "serial" definition type properly.
  - Get information on the "enum" definition type.
  - Re-work getting information about keys/indices.
On MariaDB:
  - Get information about lengths in indices.
  - Get foreign key information separately from the rest as they can have
    colliding names.