lib-storage: Human search parser now fails if given mailbox name isn't valid UTF8.
lib-storage: Human search parser now fails if given mailbox name isn't valid UTF8.

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branch : HEAD

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