stop .forward file being a symlink

lib/session.php

@@ -228,7 +228,7 @@ class Session
         // the bash script returns 0 for no and 1 for yes, takes one arg, username
         $this->email = shell_exec("../plugins/sucsunreadmail $user");
 
-        if (file_exists($info['homedirectory'][0] . "/.forward")) {
+        if (file_exists($info['homedirectory'][0] . "/.forward") && ! is_link($info['homedirectory'][0] . "/.forward")) {
             $forward = file($info['homedirectory'][0] . "/.forward");
             $this->email_forward = preg_replace("/\n/", "", $forward[0]);
         }