Cleanups.

Remove default 192.168.42.42/32 allow.
Restore missing app/fax/resources/functions/parse_attachments.php to satisfy pre-existing include
Fix so sql in voicemail app works if var undefined.  Warning: don't know if non Mariadb's like cast(...) .
Cleanup close in event socket.

resources/classes/event_socket.php

@@ -164,7 +164,7 @@ class event_socket {
 
 	public function close() {
 		if ($this->fp) {
-			fclose($fp->fp);
+			fclose($this->fp);
 			$this->fp = false;
 		}
 	}