issue #138 ; make ajaxchat optional and configurable. For reasons we've discussed repeatedly the ajax chat will not be removed from core as XMPP chat does not provide decentralised access control compatible with nomadic identity.

include/features.php

@@ -56,7 +56,7 @@ function get_features($filtered = true) {
 			array('private_notes',       t('Private Notes'),          t('Enables a tool to store notes and reminders (note: not encrypted)'),false,get_config('feature_lock','private_notes')),
 			array('nav_channel_select',  t('Navigation Channel Select'), t('Change channels directly from within the navigation dropdown menu'),false,get_config('feature_lock','nav_channel_select')),
 			array('photo_location',       t('Photo Location'),          t('If location data is available on uploaded photos, link this to a map.'),false,get_config('feature_lock','photo_location')),
-
+			array('ajaxchat',       t('Access Controlled Chatrooms'),          t('Provide chatrooms and chat services with access control.'),true,get_config('feature_lock','ajaxchat')),
 			array('smart_birthdays',       t('Smart Birthdays'),          t('Make birthday events timezone aware in case your friends are scattered across the planet.'),true,get_config('feature_lock','smart_birthdays')),
 			array('expert',       t('Expert Mode'),                 t('Enable Expert Mode to provide advanced configuration options'),false,get_config('feature_lock','expert')),
 			array('premium_channel', t('Premium Channel'), t('Allows you to set restrictions and terms on those that connect with your channel'),false,get_config('feature_lock','premium_channel')),