Properly check LAN IP in HasRemoteAccess

We cannot simply use the subnet list to check if the IP is in LAN as it does not handle special cases like IPv4MappedToIPv6 and IPv6 loopback addresses.

src/Jellyfin.Networking/Manager/NetworkManager.cs

@@ -702,7 +702,7 @@ public class NetworkManager : INetworkManager, IDisposable
                 return false;
             }
         }
-        else if (!_lanSubnets.Any(x => x.Contains(remoteIP)))
+        else if (!IsInLocalNetwork(remoteIP))
         {
             // Remote not enabled. So everyone should be LAN.
             return false;