So, tighten things up a little further. QA Team, please check this.

git-svn-id: file:///svn/phpbb/branches/phpBB-3_0_0@8554 89ea8834-ac86-4346-8a33-228a782c2dd0

phpBB/install/database_update.php

@@ -1740,6 +1740,10 @@ function change_database_data($version)
 			// TODO: remove all form token min times
 
 		break;
+		
+		case '3.0.1':
+
+			set_config('referer_validation', '1');
 	}
 }