This branch was created from Git SHA 94fd39fa1a786c425530da018bc3e948dd6ae732,
which corresponds to changeset 18021:413ede7e6962 of the official GMP Mercurial
repo.  That commit is the source of GMP 6.2.0, release 2020.01.17. It was
cloned using

git clone hg::https://gmplib.org/repo/gmp

after installation of the git-remote-hg package.  The package was installed via
Debian, but presumably can be made to work with any git install following
instructions on its github page: https://github.com/fingolfin/git-remote-hg

All Wolfram-specific changes will be recorded in this branch.  When we update
to a newer version of GMP, it will be appropriate to pull from the mercurial
repo, then create a new release/XXXX-wolfram branch to continue development.
