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 r270647: Add references to vt(4) and the configuration files in /usr/sha
MFC r270653: Update man-pages to correctly refer to changed pathes and namin
MFC r270657: More man pages that need to know about vt in addition to syscon
MFC r270659: (by pluknet@) Missed comma.
MFC r270660: Back-out the references to vt(4) from this man-page. It appears
MFC r270933: Add references to vt(4) to further man-pages.
MFC r270934: Final patches to the tools used to convert syscons keymaps for
MFC r270935: Add vt(4) support to the console initialisation script, specifi

Second batch of MFCs to add support for Unicode keymaps for use with vt(4).

It contains the following changes:

- Add references to vt(4) to relevant man-pages.
- Update comment in defaults/rc.conf to mention vt
- Update rc.d/syscons to warn about syscons keymaps used under vt.
An attempt is made to identify the vt keymap to load instead.
- Minor changes to the conversion tool based on mail comments on keymaps.

Relnotes: yes

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

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

Changed "conscontrol unset" to accept an existing virtual
console device as an argument. Unsetting virtual console
using /dev/console seems to have never worked.

MFC after: 3 days

Sync program's usage() with manpage's SYNOPSIS.

Note that conscontrol set and unset are an interface for TIOCCONS.

Add to conscontrol(8) "set" and "unset" commands which modify the
virtual console set-up. Specifically, "conscontrol unset" will cause
printf(9) output to start going to the console again.

Assorted markup, grammar, and spelling fixes.

Explain what console names are valid.

The .Nm utility

Style and WARNS cleanups.

Submitted by: ru

Mdoc fixes and clarification.

Submitted by: sheldonh

Add a manual page.