message: Add a comment explaining the new API.
diff: @@ -143,6 +143,12 @@ public:
  // Inform the sync session that it should log out.
  void log_out();
  + // Override the address and port of the server that this `SyncSession` is connected to. If the
  + // session is already connected, it will disconnect and then reconnect to the specified address.
  + // If it's not already connected, future connection attempts will be to the specified address.
  + //
  + // NOTE: This is intended for use only in very specific circumstances. Please check with the
  + // object store team before using it.
  void override_server(std::string address, int port);
  // An object representing the user who owns the Realm this `SyncSession` represents.
  