Issue Releated with Checksum on install-tl.zip

[Karl Berry]

I suppose the checksums are different because the install-tl.zip
packages are different. Clearly it is not up to us when or if CTAN
mirrors update. Seems to me you have to check the validity of the
checksum against the file on the same server. CTAN is not an
instantaneous mirror system.

As far as our server goes, the cron job usually finishes around 02:00
CEST (France) time. But it's indeterminate when the ctan master host
picks it up, and it's even more indeterminate when the ctan mirrors sync
against the master.

As for github, the release process is complicated enough already just
doing everything locally. I'm not going to complicate it further. Sorry.

Best,
Karl