Set expected http response code

[Gaz492]

Is your feature request related to a problem? Please describe.
Ability to set expected HTTP response code

Describe the solution you'd like
Add a new monitoring type that allows you to specify an expected HTTP response code

[Panja0]

Already requested in: #21

Accepted HTTP codes: I would like to add status codes to some HTTP request, 401 for instance

[Gaz492]

Ahh, my bad must have missed that when I searched, ill close this to avoid duplicates.