[tex-live] infra download fails.

[Adam R. Maxwell]

> On Apr 17, 2016, at 16:53 , Norbert Preining <preining at logic.at> wrote:
> 
>> Okay. I may just get rid of the hash check rather than deal
>> with backwards compatibility issues.
> 
> Fit the next years we don't expect the need to switch checksum format again ;-)

Well, I have to support old versions of tlmgr. Maybe introducing
another version check won't be a big deal; I'll have to look
closer.

-- adam