The new API avoids using HTTP status codes and verbs.
Added new structure for having a similar response envelope and pagination support for V2 calls.
Added extensions to the systemInfo call so the client knows if the V2 methods are available.
This adds a manually implemented hostname check that is applied as an endpoint filter.
With the implemented filter, the validation rules are similar to those before Kestrel was introduced.
This fixes#5469
Re-implemented everything using ASP.NET.
Changed some requests to use JSON instead of FORM data.
Some work towards deleting the FIXMEGlobal instance.
Auth is missing, XSRF does not work correctly.