lib-storage: If mailbox autocreate fails with "already exists", ignore the error. This check was supposed to have been already there, but it was checking for the wrong error.
lib-storage: If mailbox autocreate fails with "already exists", ignore the error.
This check was supposed to have been already there, but it was checking for
the wrong error.

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot