Heads-up: importing libcbor and libfido2 into the base system

From: Ed Maste <emaste_at_freebsd.org>
Date: Sat, 18 Sep 2021 15:59:30 UTC 
To enable FIDO/U2F support in OpenSSH I intend to import two
dependencies into the base system:

Name: libcbor
URL: https://github.com/PJK/libcbor
License: MIT

Name: libfido2
URL: https://github.com/Yubico/libfido2
License: BSD-2-Clause

I currently expect to make them PRIVATELIBs. This means they will be
available for use only by the base system, and the import will have no
impact on the ports tree.