With allow_queue_image in the session, queue=1 showed a visitor the whole
queue and the hidden stories. display.php now shows a visitor only the
image they submitted.
Replace the short open tags and the removed functions (mcrypt, mysql_error,
salt-less crypt). Decode the reCAPTCHA reply as JSON, turn off mysqli
exceptions, drop stripslashes(), and default missing input values.
Fix the misplaced continue in prune_images().