Added user forum tracking strings.

lang/en/forum.php

@@ -89,14 +89,18 @@
 $string['nodiscussions'] = 'There are no discussion topics yet in this forum';
 $string['noguestpost'] = 'Sorry, guests are not allowed to post.';
 $string['noguestsubscribe'] = 'Sorry, guests are not allowed to subscribe to receive forum postings by email.';
+$string['noguesttracking'] = 'Sorry, guests are not allowed to set tracking options.';
 $string['nomorepostscontaining'] = 'No more posts containing \'$a\' were found';
 $string['nonews'] = 'No news has been posted yet';
 $string['noposts'] = 'No posts';
 $string['nopostscontaining'] = 'No posts containing \'$a\' were found';
 $string['nosubscribers'] = 'There are no subscribers yet for this forum';
 $string['notingroup'] = 'Sorry, but you need to be part of a group to see this forum.';
+$string['notrackforum'] = 'Don\'t track unread messages';
 $string['nownotsubscribed'] = '$a->name will NOT receive copies of \'$a->forum\' by email.';
+$string['nownottracking'] = '$a->name is no longer tracking \'$a->forum\'.';
 $string['nowsubscribed'] = '$a->name will receive copies of \'$a->forum\' by email.';
+$string['nowtracking'] = '$a->name is now tracking \'$a->forum\'.';
 $string['numposts'] = '$a posts';
 $string['olderdiscussions'] = 'Older discussions';
 $string['oldertopics'] = 'Older topics';
@@ -174,6 +178,8 @@
 $string['subscribestop'] = 'I don\'t want email copies of posts to this forum';
 $string['subscription'] = 'Subscription';
 $string['subscriptions'] = 'Subscriptions';
+$string['trackforum'] = 'Track unread messages';
+$string['tracking'] = 'Track';
 $string['unread'] = 'Unread';
 $string['unreadposts'] = 'Unread posts';
 $string['unreadpostsnumber'] = '$a unread posts';