chore: CI does not do IPv6

Author: richardschneider

src/IPAddressExtensions.cs

@@ -20,7 +20,7 @@ public static class IPAddressExtensions
         ///   An IP Addresses.
         /// </param>
         /// <returns>
-        ///   The subnet mask; ror example "127.0.0.1" returns "255.0.0.0".
+        ///   The subnet mask; for example "127.0.0.1" returns "255.0.0.0".
         ///   Or <b>null</b> When <paramref name="address"/> does not belong to 
         ///   the localhost.
         /// s</returns>

src/ServiceDiscovery.cs

@@ -381,10 +381,11 @@ void OnQuery(object sender, MessageEventArgs e)
             {
                 ;
             }
-                // Only return address records that the querier can reach.
-                response.Answers.RemoveAll(rr => IsUnreachable(rr, e.RemoteEndPoint));
-                response.AuthorityRecords.RemoveAll(rr => IsUnreachable(rr, e.RemoteEndPoint));
-                response.AdditionalRecords.RemoveAll(rr => IsUnreachable(rr, e.RemoteEndPoint));
+
+            // Only return address records that the querier can reach.
+            response.Answers.RemoveAll(rr => IsUnreachable(rr, e.RemoteEndPoint));
+            response.AuthorityRecords.RemoveAll(rr => IsUnreachable(rr, e.RemoteEndPoint));
+            response.AdditionalRecords.RemoveAll(rr => IsUnreachable(rr, e.RemoteEndPoint));
 
             if (QU)
             {

test/IPAddressExtensionsTest.cs

@@ -23,6 +23,7 @@ public void SubnetMask_Ipv4Loopback()
         }
 
         [TestMethod]
+        [TestCategory("IPv6")]
         public void SubnetMask_Ipv6Loopback()
         {
             var mask = IPAddress.IPv6Loopback.GetSubnetMask();