cope with openbsd ancient nameser.h

Index: main/dns_core.c
--- main/dns_core.c.orig
+++ main/dns_core.c
@@ -376,12 +376,12 @@ int ast_dns_resolve_ipv6_and_ipv4(struct ast_sockaddr 
 		ast_log(LOG_ERROR, "Couldn't allocate DNS query structure\n");
 		return -1;
 	}
-	rc = ast_dns_query_set_add(queries, host, ns_t_aaaa, ns_c_in);
+	rc = ast_dns_query_set_add(queries, host, T_AAAA, C_IN);
 	if (rc != 0) {
 		ast_log(LOG_ERROR, "Couldn't add 'AAAA' DNS query for '%s'\n", host);
 		return -1;
 	}
-	rc = ast_dns_query_set_add(queries, host, ns_t_a, ns_c_in);
+	rc = ast_dns_query_set_add(queries, host, T_A, C_IN);
 	if (rc != 0) {
 		ast_log(LOG_ERROR, "Couldn't add 'A' DNS query for '%s'\n", host);
 		return -1;
@@ -406,7 +406,7 @@ int ast_dns_resolve_ipv6_and_ipv4(struct ast_sockaddr 
 			const unsigned char *data = (unsigned char *)ast_dns_record_get_data(record);
 			int rr_type = ast_dns_record_get_rr_type(record);
 
-			if (rr_type == ns_t_aaaa && data_size == 16) {
+			if (rr_type == T_AAAA && data_size == 16) {
 				struct sockaddr_in6 sin6 = { 0, };
 
 				sin6.sin6_port = in_port;
@@ -416,7 +416,7 @@ int ast_dns_resolve_ipv6_and_ipv4(struct ast_sockaddr 
 				address->len = sizeof(sin6);
 
 				return 0;
-			} else if (rr_type == ns_t_a && data_size == 4) {
+			} else if (rr_type == T_A && data_size == 4) {
 				struct sockaddr_in sin4 = { 0, };
 
 				sin4.sin_port = in_port;
