lib-storage: Avoid assert-crashing with non-mUTF7/UTF8 entries in subscriptions file.
lib-storage: Avoid assert-crashing with non-mUTF7/UTF8 entries in subscriptions file.

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