Admin console allows assigning multiple connectors to the same socket binding

When creating a connector, the form checks that the value "Socket Binding" does not reference a socket binding that is already taken by another connector. If it is taken, validation of the form fails. However, when you successfully create a server and then CHANGE the Socket Binding using the 'Edit' button, this validation is not applied. Therefore it is possible to assign two different connectors to the same socket binding, e.g. to the same port.

This will cause a "java.lang.Exception: Socket bind failed: [98] Address already in use" when the server is restarted.