HX509_QUERY_MATCH_SERIALNUMBER
q->match |= HX509_QUERY_MATCH_SERIALNUMBER|HX509_QUERY_MATCH_ISSUER_NAME;
if ((q->match & HX509_QUERY_MATCH_SERIALNUMBER)
q.match = HX509_QUERY_MATCH_SERIALNUMBER|HX509_QUERY_MATCH_ISSUER_NAME;