cgit: [PATCH] timegm() compat for non-Linux and non-BSD

[Jason A. Donenfeld]

Thanks for posting that thread. I'd forgotten about that. I think my
views there are still solid:

We either use the hack from the manpage (which is what Brad's patch
does), or, so that we don't have to make compatibility infrastructure,
we simply work around this function so that we don't need it. Seeing
as it's only used in one place, I dont think this will be a problem.
I'll gladly accept a patch that fixes that.