Added help text as requested in #1349.

mod/notifications.php

@@ -185,7 +185,7 @@ function notifications_content(&$a) {
 						'$intro_id' => $rr['intro_id'],
 						'$friend_selected' => $friend_selected,
 						'$fan_selected' => $fan_selected,
-						'$approve_as' => t('Approve as: '),
+						'$approve_as' => t('Shall your connection be bidirectional or not? "Friend" implies that you allow to read and you subscribe to their posts. "Fan" means that you allow to read but you do not want to read theirs. Approve as: '),
 						'$as_friend' => t('Friend'),
 						'$as_fan' => (($rr['network'] == NETWORK_DIASPORA) ? t('Sharer') : t('Fan/Admirer'))
 					));