- performance fix: don't check mbstring functions existence too often

alecpl

2009-07-23 ee258ce15870e6cb4b733087368a062b5fd66b52

 program/include/rcmail.php

@@ -481,7 +481,7 @@

    // lowercase username if it's an e-mail address (#1484473)
    if (strpos($username, '@'))
      $username = rc_strtolower($username);
      $username = mb_strtolower($username);

    // user already registered -> overwrite username
    if ($user = rcube_user::query($username, $host))