Merge Barrucadu/diceroll into master

inc/config.php

@@ -549,6 +549,10 @@
 		'eu' => 'Europe'
 	);
 	*/
+
+	// Allow dice rolling: an email field of the form "dice XdY+/-Z" will result in X Y-sided dice rolled and summed,
+	// with the modifier Z added, with the result displayed at the top of the post body.
+	$config['allow_roll'] = false;
 	
 /*
 * ====================