Update commercial consultant list enter for Venture37

PR:		191407
Submitted by:	Sevan Janiyan (original)
Approved by:	bcr
CR:		https://reviews.freebsd.org/D484
Improve bhyve chapter based on feedback from grehan@
Improve documentation about /etc/ttys and mention that it is included by default in 9.3 and 10.1

Approved by:	bcr
Sponsored by:	ScaleEngine Inc.
CR:		https://reviews.freebsd.org/D429