Don't reset a VPN's NetId in the connect() shim.

Change-Id: I0cc6c0e221a40c9100c8f4c0c5e761fce3f9b0ae
diff --git a/server/NetworkController.h b/server/NetworkController.h
index f0a5ea7..479af5e 100644
--- a/server/NetworkController.h
+++ b/server/NetworkController.h
@@ -51,6 +51,7 @@
     // requests to VPNs without DNS servers.
     unsigned getNetworkForUser(uid_t uid, unsigned requestedNetId, bool forDns) const;
     unsigned getNetworkForInterface(const char* interface) const;
+    bool isVirtualNetwork(unsigned netId) const;
 
     // TODO: Remove this hack.
     unsigned getNetIdForLocalNetwork() const;