improve timezone detection for caldav and remove smart birthday feature. Force adjust birthdays until we agree on how to deal with this.

include/features.php

@@ -96,14 +96,15 @@ function get_features($filtered = true, $level = (-1)) {
 				false,
 				get_config('feature_lock','event_tz_select'),
 			],
-
+/*
 			[
 				'smart_birthdays',
 				t('Smart Birthdays'),
 				t('Make birthday events timezone aware in case your friends are scattered across the planet.'),
-				true,
+				false,
 				get_config('feature_lock','smart_birthdays'),
 			]
+*/
 
 		],