Log when a persistent connection is reused.

Use anchor type on `{WGI_STANDALONE_CONNECTOR}.configuration` and `{WSF_STANDALONE_SERVICE_LAUNCHER}.connector`.
Add access to the socket of standalone input stream from `{WSF_STANDALONE_CONNECTOR_ACCESS}`.
Removed a useless redefination in `WSF_EXECUTION`.

library/server/ewsgi/connectors/standalone/lib/httpd/httpd_request_handler_i.e

@@ -202,6 +202,8 @@ feature -- Execution
 				n := n + 1
 				if n >= m then
 					is_next_persistent_connection_supported := False
+				elseif n > 1 and is_verbose then
+					log ("Reuse connection (" + n.out + ")", information_level)
 				end
 					-- FIXME: it seems to be called one more time, mostly to see this is done.
 				execute_request