lib-storage: When uid/gid is invalid, tell if it's from setting or userdb lookup.
lib-storage: When uid/gid is invalid, tell if it's from setting or userdb lookup.

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