- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r274720:

Fix improper .Fx macro usage.

Sponsored by: The FreeBSD Foundation

MFC: r272135, r272174
Update man(1) to list the different sections of the manual

Approved by: eadler (mentor, implicit)
Sponsored by: ScaleEngine Inc.

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

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

Remove default support for 1aout section manpages. There haven't been
any since at least July 2002.

Clean up markup.

Approved by: re (kib)

When MANCOLOR environment variable is set, enable ANSI color escapes
in grotty(1). This makes it possible to view colorized manpages in
color.

When MANPAGER environment variable is set, use it instead of PAGER.

Why another environment variable, one might ask? With color output
enabled, both a terminal and a pager should support the ANSI color
escapes. On a supporting terminal, less(1) with option -R would be
such a pager, while "more -s" (the current default pager for man(1))
will show garbage. It means a different default pager is needed when
color output is enabled, but many people have PAGER set customary,
and it's unlikely to support ANSI color escapes, so introducing yet
another variable (MANPAGER) seemed like a good option to me:

- if MANPAGER is set, use that unconditionally;

- if you disable color support (it is by default), and don't set
MANPAGER, you get an old behavior: -P pager, $PAGER, "more -s",
in that order;

- if you enable color support (by setting MANCOLOR), and don't set
MANPAGER, we ignore PAGER which is unlikely to support ANSI color
escapes, and you get: -P pager, "less -Rs", in that order;

- you might have good reasons for different man(1) and general
purpose pagers;

- later versions of GNU man(1) support MANPAGER.

Added support for the MANWIDTH environment variable:

If set to a numeric value, used as the width manpages should be
displayed. Otherwise, if set to a special value ``tty'', and
output is to a terminal, the pages may be displayed over the
whole width of the screen.

Add the ability to display specific manual pages if passed on the
commandline. This mirrors the old (undocumented) GNU man functionality.
Also document this feature in the implementation notes section of
the manpage.

Submitted by: arundel
Approved by: wes (mentor implicit)

Add reference to intro(1) in SEE ALSO section.

PR: docs/151216
Approved by: wes (mentor, implicit)

Implementaiton of man, manpath, whatis, and apropos written entirely in sh.

Features of this new version in favor of the old one:
BSD licensed -- old one is GPL.
Imports configuration from /etc/man.conf and LOCALBASE/etc/man.d/*.conf
allowing ports to extend the base functionality. The pluggable
configuration can supplement the manual search path (retiring use.perl),
add locales, and override language specific toolsets (attempt to merge
the japanese/man port into the base system as much as possible).

Much effort has been made to make this version mirror the functionality
of the existing implementation. For 99% of users, it should be a drop in
replacement.

PR: gnu/143271, gnu/4419
Reviewed by: dougb (previous versions)
Approved by: wes (mentor)