[MM-45309] Replace github.com/mattermost/gziphandler with github.com/klauspost/compress/gzhttp (#24293)

server/channels/web/static.go

@@ -13,7 +13,7 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/mattermost/gziphandler"
+	"github.com/klauspost/compress/gzhttp"
 
 	"github.com/mattermost/mattermost/server/public/model"
 	"github.com/mattermost/mattermost/server/public/shared/mlog"
@@ -39,8 +39,8 @@ func (w *Web) InitStatic() {
 		pluginHandler := staticFilesHandler(http.StripPrefix(path.Join(subpath, "static", "plugins"), http.FileServer(http.Dir(*w.srv.Config().PluginSettings.ClientDirectory))))
 
 		if *w.srv.Config().ServiceSettings.WebserverMode == "gzip" {
-			staticHandler = gziphandler.GzipHandler(staticHandler)
-			pluginHandler = gziphandler.GzipHandler(pluginHandler)
+			staticHandler = gzhttp.GzipHandler(staticHandler)
+			pluginHandler = gzhttp.GzipHandler(pluginHandler)
 		}
 
 		w.MainRouter.PathPrefix("/static/plugins/").Handler(pluginHandler)