Add CGI test for windows, that does not need an extra interpreter

test/windows.cgi

@@ -0,0 +1,2 @@
+#!windows.cgi.cmd
+

test/windows.cgi.cmd

@@ -0,0 +1,5 @@
+@echo off
+echo HTTP/1.1 200 OK
+echo Connection: close
+echo.
+echo CGI test