WIP: GnuTLS HMAC and symmetric cipher support with tests
For review as per https://lists.gnu.org/archive/html/emacs-devel/2017-04/msg00313.html
Do not merge. Just for discussion.
For review as per https://lists.gnu.org/archive/html/emacs-devel/2017-04/msg00313.html
Do not merge. Just for discussion.