Fixed problem with droping query string.

mux.go

@@ -67,6 +67,14 @@ func (r *Router) Match(req *http.Request, match *RouteMatch) bool {
 func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	// Clean path to canonical form and redirect.
 	if p := cleanPath(req.URL.Path); p != req.URL.Path {
+
+		// Added 3 lines (Philip Schlump) - It was droping the query string and #whatever from query.
+		// This matches with fix in go 1.2 r.c. 4 for same problem.  Go Issue: 
+		// http://code.google.com/p/go/issues/detail?id=5252
+		url := *req.URL
+		url.Path = p
+		p = url.String()
+
 		w.Header().Set("Location", p)
 		w.WriteHeader(http.StatusMovedPermanently)
 		return