lmtp: Fixed loading Sieve plugin when configuring --without-shared-libs
lmtp: Fixed loading Sieve plugin when configuring --without-shared-libs

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