o Add new commiter (jch) entry
o Add PGP key
o Announce new commit bit

Differential Revision:	https://reviews.freebsd.org/D825
Approved by:		jhb (mentor)


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45665 c2e8774f-c49f-e111-b436-862b2bbc8956