Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

MFC r258355,258360,258400-258401,258406-258407,258418,258430,258439,258589-
258590,258592,258727-258728,258785, with the following descriptions:

Revisions 258400-258401,258406-258407,258590,258727-258728,258785:
+ Add a new `includes' module (see: bsdconfig includes -h) for exploring
the bsdconfig(8) API

Remaining revisions:
258592: Sort all the messages.subr files
258355: Fix typo in a comment in networking/device.subr
258360: Whitespace, style, and other changes in networking/device.subr
258418: Quote interface names for good measure in networking/device.subr
258430: Remove an unused line in networking/device.subr
258439: Minor bugfix to f_die() function in common.subr
258589: Minor bugfix to syscons_ttys module

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Commit first portion of package module -- this includes the ability to view
categories, view packages, mark packages for installation, de-installation,
or re-installation, calculate and track dependencies, as well as ability to
review selections.

Still to come is the actual processing of selections (performing the
various actions associated with the user's selections, such as installing
dependencies first, then selections, etc.).

Remove NO_OBJ from Makefiles that generate manuals because this causes the
GZIP compressed manuals to appear in ./src instead of the appropriate obj dir.

PR: conf/175844
Submitted by: Dominique Goncalves <dominique.goncalves@gmail.com>

Move major includes into /usr/share/bsdconfig for easy external access.

Reviewed by: adrian (co-mentor)
Approved by: adrian (co-mentor)

Import bsdconfig(8) as a replacement for the post-install abilities of
deprecated sysinstall(8). NOTE: WITH_BSDCONFIG is currently required.

Submitted by: Devin Teske (dteske), Ron McDowell <rcm@fuzzwad.org>
Reviewed by: Ron McDowell <rcm@fuzzwad.org>
Approved by: Ed Maste (emaste)