change activitystreams unfollow to stop-follow but also send out OStatus unfollow

mod/contacts.php

@@ -165,7 +165,8 @@ function contacts_content(&$a) {
 					'$type' => 'text',
 					'$content' => t('stopped following'),
 					'$nick' => $a->user['nickname'],
-					'$verb' => ACTIVITY_UNFOLLOW
+					'$verb' => ACTIVITY_UNFOLLOW,
+					'$ostat_follow' => '<as:verb>http://ostatus.org/schema/1.0/unfollow</as:verb>' . "\r\n";
 				));
 
 				if((x($orig_record[0],'notify')) && (strlen($orig_record[0]['notify']))) {