[Don't capture trailing ")", "]" or ">" as part of URLs
Earle Martin <earle@downlode.org>**20080715022045] hunk ./lib/util.php 596
-	$r = preg_replace('@https?://\S+@', '<a href="\0" class="extlink">\0</a>', $r);
+	$r = preg_replace('@https?://[^)\]>\s]+@', '<a href="\0" class="extlink">\0</a>', $r);