Also support "last X" REST interface

sql/db_update_0.6.6_0.6.7_mysql.sql

@@ -0,0 +1,3 @@
+ALTER TABLE `{PREFIX}entries` ADD `moderate_comments` ENUM('true','false') DEFAULT 'false' NOT NULL AFTER `allow_comments`;
+ALTER TABLE `{PREFIX}comments` ADD `status` VARCHAR( 50 ) NOT NULL AFTER `subscribed` ;
+UPDATE {PREFIX}comments SET status = 'approved';