Squash IMAP errors when auto-fetching; fix was previously applied, but only for manual fetches

ChangeLog

@@ -105,6 +105,7 @@ Version 1.5.1 -- CVS
   - Added MySQL password/UNIX crypt support to mysql backend in the
     change_password plugin
   - Make SMTP Authentication detection in conf.pl more RFC-compliant.
+  - Fixed IMAP errors when using mail_fetch plugin to auto-fetch on login.
 
 Version 1.5.0
 --------------------