MINOR: dns: new dns record type (RTYPE) for OPT
DNS record type OPT is required to send additional records.
OPT has been assigned ID 41.
diff --git a/include/types/dns.h b/include/types/dns.h
index c371d5f..9bf3c7e 100644
--- a/include/types/dns.h
+++ b/include/types/dns.h
@@ -64,6 +64,7 @@
#define DNS_RTYPE_CNAME 5 /* canonical name */
#define DNS_RTYPE_AAAA 28 /* IPv6 address */
#define DNS_RTYPE_SRV 33 /* SRV record */
+#define DNS_RTYPE_OPT 41 /* OPT */
#define DNS_RTYPE_ANY 255 /* all records */
/* dns rcode values */