Useless free_result

Signed-off-by: emanuele <emanuele45@gmail.com>
Let's use markBoardsRead

Signed-off-by: emanuele <emanuele45@gmail.com>
ModerateAttachments.controller is query-free zone

Signed-off-by: emanuele <emanuele45@gmail.com>
Also OpenID.controller should be query-free

Signed-off-by: emanuele <emanuele45@gmail.com>
Removed queries from Poll.controller too

Signed-off-by: emanuele <emanuele45@gmail.com>
Queries out of Stats.controller too

Signed-off-by: emanuele <emanuele45@gmail.com>