If maildir is readonly, don't complain about rename() failing to move mails from new/ to cur/.
If maildir is readonly, don't complain about rename() failing to move mails
from new/ to cur/.

--HG--
branch : HEAD

jwm/dovecot-notmuch,dscho/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot,dscho/dovecot,dscho/dovecot,jkerihuel/dovecot,dscho/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,dscho/dovecot