[tex-k] Reproducible builds using pdftex

[Karl Berry]

    If I looked at one-line documentation for SOURCE_DATE_EPOCH I for one 
    would expect it to change \day, \month and \year as well.  

Norman, I understand your point, but I strongly disagree.  In the
version that TeX Live ships, people will need to set a second envvar to
change the TeX primitives.

It is already highly frustrating to be going through this process at
after the last second.  Please, let's stop the discussion so we can get
the work done.

best,
karl