lib-storage: If client_limit=1, send user's log prefix to log process.
lib-storage: If client_limit=1, send user's log prefix to log process.

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