mandril: Check URL in stage_30 instead of stage_20.

Assures that check is done on all pipelined requests.

Signed-off-by: Sonny Karlsson <ksonny@lotrax.org>
mandril: Add deny_hotlink /path directive.

Deny any access to /path if referer is another domain.

Signed-off-by: Sonny Karlsson <ksonny@lotrax.org>
mk_connection: Remove unused conn_switch declarations.

Signed-off-by: Sonny Karlsson <ksonny@lotrax.org>