Fix redirect with non-ascii branch names (#4764) (#4810)

* Fix redirect with non-ascii branch names (#4764)

* Add integration tests for non-ascii branch redirect

* Fix mysql test and coverage test

modules/context/repo.go

@@ -625,7 +625,7 @@ func RepoRefByType(refType RepoRefType) macaron.Handler {
 				// redirect from old URL scheme to new URL scheme
 				ctx.Redirect(path.Join(
 					setting.AppSubURL,
-					strings.TrimSuffix(ctx.Req.URL.String(), ctx.Params("*")),
+					strings.TrimSuffix(ctx.Req.URL.Path, ctx.Params("*")),
 					ctx.Repo.BranchNameSubURL(),
 					ctx.Repo.TreePath))
 				return