Set status reason text with constructor

[seghcder]

Small suggestion - It would be good if instead of:

auto status =restinio::status_bad_request();
status.reason_phrase("Only Basic authorization currently supported");

we could do this:

auto status =restinio::status_bad_request("Only Basic authorization currently supported");

However I also read that HTTP/2 does away with text reason phrases: https://github.com/http2/http2-spec/issues/202 ... so if you are planning http/2 support soon then it might not be worth it.

[eao197]

Helper functions like status_bad_request were created for cases when a user doesn't want to specify own error description. If a custom error description is necessary then underlying http_status_line_t object can be constructed directly. For example:

auto status = restinio::http_status_line_t{
      restinit::status_code::bad_request, 
      "Only Basic authorization currently supported"
};

or

restinio::http_status_line_t status{
      restinit::status_code::bad_request, 
      "Only Basic authorization currently supported"
};

[seghcder]

Got it :-)