dbox: Create dbox temp files with ".temp." prefix, not "temp." This makes it consistent with the rest of the created temp files and also gets any stale temp files deleted.
dbox: Create dbox temp files with ".temp." prefix, not "temp."
This makes it consistent with the rest of the created temp files and also
gets any stale temp files deleted.

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