Fix: FastCGI web service does not change the status line of the response.

As a result all responses were returned as 200 OK. For this to work
the response has to have a header Status: with the intended status line.

Fixed by dynamically generating the Status: header during response
serialization.
Merge branch 'juliofcgi' of https://github.com/julitopower/DisplayCluster into juliofcgi

Conflicts:
	tests/fcgiws/ResponseTests.cpp