pop3-migration: struct mailbox must be freed before mail_storage is destroyed. Fixes a memory leak where the user wasn't destroyed at all because the mailbox still caused the user to be referenced.
pop3-migration: struct mailbox must be freed before mail_storage is destroyed.
Fixes a memory leak where the user wasn't destroyed at all because the
mailbox still caused the user to be referenced.

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