[GITEA] Use maintained gziphandler

- https://github.com/NYTimes/gziphandler doesn't seems to be maintained
anymore and Forgejo already includes
https://github.com/klauspost/compress which provides a maintained and
faster gzip handler fork.
- Enables Jitter to prevent BREACH attacks, as this *seems* to be
possible in the context of Forgejo.

(cherry picked from commit cc2847241d)
(cherry picked from commit 99ba56a876)

Conflicts:
	go.sum
	https://codeberg.org/forgejo/forgejo/pulls/1581
(cherry picked from commit 711638193d)
(cherry picked from commit 9c12a37fde)
(cherry picked from commit d130653454)
(cherry picked from commit 45a16f8c3c)
(cherry picked from commit a497acb31f)
(cherry picked from commit fe87fd8289)
(cherry picked from commit 6ac12e6693)
(cherry picked from commit 981ec37e1e)
(cherry picked from commit 5d6892ec10)
(cherry picked from commit 9df7968f4f)

modules/web/handler.go

@@ -147,6 +147,16 @@ func toHandlerProvider(handler any) func(next http.Handler) http.Handler {
 		}
 	}
 
+	if hp, ok := handler.(func(next http.Handler) http.HandlerFunc); ok {
+		return func(next http.Handler) http.Handler {
+			h := hp(next) // this handle could be dynamically generated, so we can't use it for debug info
+			return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
+				routing.UpdateFuncInfo(req.Context(), funcInfo)
+				h.ServeHTTP(resp, req)
+			})
+		}
+	}
+
 	provider := func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(respOrig http.ResponseWriter, req *http.Request) {
 			// wrap the response writer to check whether the response has been written