Document incompatibility between bsdconfig(8) and
pkg(8) in 10.1-RELEASE, and provide steps to install
the on-disc packages via alternative method.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation
Update releng/10.1 to -RELEASE status, and prepare
for final 10.1-RELEASE builds.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation