If we fail opening/creating the mailbox list indexes, don't crash.
If we fail opening/creating the mailbox list indexes, don't crash.

Distrotech/dovecot,Distrotech/dovecot,damoxc/dovecot,Distrotech/dovecot,Distrotech/dovecot,damoxc/dovecot,damoxc/dovecot,damoxc/dovecot,Distrotech/dovecot,damoxc/dovecot