Show extra promise info in verbose mode

On promise status update (cfPS), print additional info about the promise
 handle, comment, version, promisee, if available, at verbose level.

Close #2636
(cherry picked from commit ff8563cb81e2ff08396e075fbb199d405d3e0ba1)
More output standardization

There should only be output string changes in this commit and therefore
should be riskless.
(cherry picked from commit 0aa8e0418a46c1964dbde668a0e5264db1685238)
Verified dragonfly and qnx gid0 names

Added support for qnx and dragonfly gid0 group names, based on:

http://gitweb.dragonflybsd.org/dragonfly.git/blame/5707c30f1cb20f5dc91961f50f676e3c9ed7dae9:/etc/group

http://www.qnx.com/developers/docs/qnx_4.25_docs/qnx4/user_guide/accounts.html
(cherry picked from commit 9837c10567aedd129709df178b655f2450d70c45)

Conflicts:
	tests/acceptance/10_files/02_maintain/205.cf