Handle redirects in git clone commands (#6688)

Add support for repo_redirect objects in the git smart http
handler so that when a user clones a repo that has been moved
or renamed, they are redirected to the new location.

This requires that the query string be included in the redirect
as well, so that is added.

Signed-off-by: James E. Blair <jeblair@redhat.com>

modules/context/repo.go

@@ -223,6 +223,9 @@ func RedirectToRepo(ctx *Context, redirectRepoID int64) {
 		fmt.Sprintf("%s/%s", repo.MustOwnerName(), repo.Name),
 		1,
 	)
+	if ctx.Req.URL.RawQuery != "" {
+		redirectPath += "?" + ctx.Req.URL.RawQuery
+	}
 	ctx.Redirect(redirectPath)
 }