Implement proposal 716, passing full paths through the Gateway and fwatchdog.

Previously, only the query string of the URL was passed through the Gateway.
With this change, the entire path requested by the client is passed through as well as the query string.

While fwatchdog already supported passing the path through, in practice this would not happen
since the Gateway would have swallowed it before forwarding the request to the watchdog.

With this change, the path portion after the function name is added to the Http_Path environment
variable, provided that cgiHeaders are enabled.  This is similar to the of-watchdog equivalent.

Signed-off-by: Thomas E Lackey <telackey@bozemanpass.com>

gateway/server.go

@@ -135,6 +135,7 @@ func main() {
 	// r.StrictSlash(false)	// This didn't work, so register routes twice.
 	r.HandleFunc("/function/{name:[-a-zA-Z_0-9]+}", functionProxy)
 	r.HandleFunc("/function/{name:[-a-zA-Z_0-9]+}/", functionProxy)
+	r.HandleFunc("/function/{name:[-a-zA-Z_0-9]+}/{params:.*}", faasHandlers.Proxy)
 
 	r.HandleFunc("/system/info", handlers.MakeInfoHandler(handlers.MakeForwardingProxyHandler(
 		reverseProxy, forwardingNotifiers, urlResolver))).Methods(http.MethodGet)
@@ -151,6 +152,7 @@ func main() {
 	if faasHandlers.QueuedProxy != nil {
 		r.HandleFunc("/async-function/{name:[-a-zA-Z_0-9]+}/", faasHandlers.QueuedProxy).Methods(http.MethodPost)
 		r.HandleFunc("/async-function/{name:[-a-zA-Z_0-9]+}", faasHandlers.QueuedProxy).Methods(http.MethodPost)
+		r.HandleFunc("/async-function/{name:[-a-zA-Z_0-9]+}/{params:.*}", faasHandlers.QueuedProxy).Methods(http.MethodPost)
 
 		r.HandleFunc("/system/async-report", faasHandlers.AsyncReport)
 	}