Add match_on option scheme in configuration.rst
Minor documentation corrections: The list of ``match_on`` options was missing ``scheme``. Also, an unneeded period appeared after URI.
@@ -42,7 +42,8 @@ This can be configured by changing the ``match_on`` setting.
The following options are available :
- method (for example, POST or GET)
-- uri (the full URI.)
+- uri (the full URI)
+- scheme (for example, HTTP or HTTPS)
- host (the hostname of the server receiving the request)
- port (the port of the server receiving the request)
- path (the path of the request)
