improvements for "Git Access" page

[Daniel Kahn Gillmor]

On Tue 2016-08-02 06:14:24 -0400, Werner Koch wrote:
> On Mon, 25 Jul 2016 16:44, fgunbin at fastmail.fm said:
>
>> - page url is https://www.gnupg.org/download/cvs_access.html , while
>>   it's certainly not "cvs" now.  Or was "vcs" meant?
>
> It is CVS because in 1997 we not even had Subversion.  Changing existing
> URLs is a no-go.

but a permanent HTTP 301 or 302 redirect to a URL that matches the
current state of the world is OK, right?

        --dkg