Handles local aliases (redirection) for file uploads attached to notices.

lib/util.php

@@ -499,6 +499,11 @@ function common_linkify($url) {
 
 // if this URL is an attachment, then we set class='attachment' and id='attahcment-ID'
 // where ID is the id of the attachment for the given URL.
+//
+// we need a better test telling what can be shown as an attachment
+// we're currently picking up oembeds only.
+// I think the best option is another file_view table in the db
+// and associated dbobject.
     $query = "select file_oembed.file_id as file_id from file join file_oembed on file.id = file_oembed.file_id where file.url='$longurl'";
     $file = new File;
     $file->query($query);