configure: Set ACLOCAL_AMFLAGS so make finds dovecot.m4.
configure: Set ACLOCAL_AMFLAGS so make finds dovecot.m4.

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