src: conditionalize EAI_ADDRFAMILY

The EAI_ADDRFAMILY constant has been removed from FreeBSD
headers, supposedly because it is deprecated by new RFC
drafts.

Previously GNULIB was providing a replacement because
MinGW lacked it too. The replacement provided for MinGW
was thus being used on FreeBSD too, but with a completely
bogus integer value.
Reviewed-by: NPavel Hrdina <phrdina@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

src/rpc/virnetsocket.c

@@ -178,8 +178,10 @@ int virNetSocketCheckProtocols(bool *hasIPv4,
     hints.ai_socktype = SOCK_STREAM;
 
     if ((gaierr = getaddrinfo("::1", NULL, &hints, &ai)) != 0) {
-        if (gaierr == EAI_ADDRFAMILY ||
-            gaierr == EAI_FAMILY ||
+        if (gaierr == EAI_FAMILY ||
+# ifdef EAI_ADDRFAMILY
+            gaierr == EAI_ADDRFAMILY ||
+# endif
             gaierr == EAI_NONAME) {
             *hasIPv6 = false;
         } else {