[PATCH] Make it possible to disable the BibTeX notice on a site-wide basis

[Ævar Arnfjörð Bjarmason]

At work (where nobody ever authors scientific papers) we've just
upgraded GNU parallel and I've had people complain to me about the
large BibTeX notice.

This patch adds the ability to disable this notice on a site-wide
basis, further info in the commit message:

https://github.com/avar/parallel/compare/master...add-ability-to-quiet-bibtex-site-wide
https://github.com/avar/parallel/compare/master...add-ability-to-quiet-bibtex-site-wide.patch

The latter URL can be wget'ed and applied with "git am".