MAX_KNOWN_EDNS_OPTS
MAX_KNOWN_EDNS_OPTS, sizeof(struct edns_known_option));
if(env->edns_known_options_num >= MAX_KNOWN_EDNS_OPTS) {
MAX_KNOWN_EDNS_OPTS, sizeof(struct edns_known_option));
if(env->edns_known_options_num >= MAX_KNOWN_EDNS_OPTS) {