It is now possible to specify the thread stack size to be used,
when a new thread is created. This will subsequently be used
for allowing the stack size to be specified for worker threads.
When MaxScale is started, a separate thread for the administrative
interface is started. This allows the worker threads to handle client
requests while the administrative thread handles the lower priority
administrative requests.
The administrative interface responds to all request with a 200 OK HTTP
response. This allows the administrative interface itself to be tested.
