[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)

tests/integration/lfs_getobject_test.go

@@ -18,9 +18,9 @@ import (
 	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/lfs"
 	"code.gitea.io/gitea/modules/setting"
-	"code.gitea.io/gitea/routers/web"
 	"code.gitea.io/gitea/tests"
 
+	"github.com/klauspost/compress/gzhttp"
 	gzipp "github.com/klauspost/compress/gzip"
 	"github.com/stretchr/testify/assert"
 )
@@ -132,7 +132,7 @@ func TestGetLFSSmallTokenFail(t *testing.T) {
 
 func TestGetLFSLarge(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()
-	content := make([]byte, web.GzipMinSize*10)
+	content := make([]byte, gzhttp.DefaultMinSize*10)
 	for i := range content {
 		content[i] = byte(i % 256)
 	}
@@ -143,7 +143,7 @@ func TestGetLFSLarge(t *testing.T) {
 
 func TestGetLFSGzip(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()
-	b := make([]byte, web.GzipMinSize*10)
+	b := make([]byte, gzhttp.DefaultMinSize*10)
 	for i := range b {
 		b[i] = byte(i % 256)
 	}
@@ -159,7 +159,7 @@ func TestGetLFSGzip(t *testing.T) {
 
 func TestGetLFSZip(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()
-	b := make([]byte, web.GzipMinSize*10)
+	b := make([]byte, gzhttp.DefaultMinSize*10)
 	for i := range b {
 		b[i] = byte(i % 256)
 	}