mbox: Fixed setting initial explicit uidvalidity/uidnext on mailbox creation.
mbox: Fixed setting initial explicit uidvalidity/uidnext on mailbox creation.

--HG--
branch : HEAD

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