fix ipv6 resolver test on windows

src/dns.c

@@ -79,6 +79,11 @@
 #include <iphlpapi.h>
 #pragma comment(lib, "IPHLPAPI.lib")
 #endif
+
+#ifndef IPV6_V6ONLY
+#define IPV6_V6ONLY 27
+#endif
+
 #else
 #include <sys/types.h>		/* FD_SETSIZE socklen_t */
 #include <sys/select.h>		/* FD_ZERO FD_SET fd_set select(2) */
@@ -5709,7 +5714,8 @@ static void dns_so_destroy(struct dns_socket *);
 static struct dns_socket *dns_so_init(struct dns_socket *so, const struct sockaddr *local, int type, const struct dns_options *opts, int *error) {
 	static struct dns_socket so_initializer;
 	static DNSBool initialized = 0;
-
+	int value=0;
+	
 	if (!initialized) {
 		memset(&so_initializer, 0, sizeof so_initializer);
 		so_initializer.opts.closefd.arg = 0;
@@ -5731,7 +5737,8 @@ static struct dns_socket *dns_so_init(struct dns_socket *so, const struct sockad
 
 	if (-1 == (so->udp = dns_socket((struct sockaddr *)&so->local, SOCK_DGRAM, error)))
 		goto error;
-
+	value=0;
+	setsockopt(so->udp, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&value, sizeof(value));
 	dns_k_permutor_init(&so->qids, 1, 65535);
 
 	return so;

tester/belle_sip_tester.c

@@ -262,7 +262,7 @@ int belle_sip_tester_run_tests(const char *suite_name, const char *test_name) {
 			if (test_name) {
 				CU_pTest test=CU_get_test_by_name(test_name, suite);
 				if (test==NULL){
-					fprintf(stderr,"There is no test named '%s'",suite_name);
+					fprintf(stderr,"There is no test named '%s'",test_name);
 					exit(-1);
 				}
 				CU_run_test(suite, test);