Move description of keyboard layouts to wskbd.4, add newer layouts

Previously, the best reference was pckbd.4. This does not make much
sense to read if you are on, say, an evbarm device with only USB.

wsconsctl.8 contained a vaguer description of supported language names,
which isn't very useful because you can't pass full language names
to the command. Point readers to wskbd.4 instead.

Note in the wskbd.4 page that while all layouts are generally supported
by pckbd(4) and ukbd(4), older keyboard interfaces might only support
a subset.

More keyboard layouts

branches: 1.28.42;
Fix typo.

branches: 1.27.6;
Mention a number of keyboard encodings.
From Jukka Ruohonen in PR kern/15955.

PR/40059 - Bug Hunting -- add Xref to wscons.conf(5)

branches: 1.25.4; 1.25.6;
Convert TNF licenses to new 2 clause variant

branches: 1.24.2; 1.24.14; 1.24.18; 1.24.20;
Mention include proper file for keyboard defines; from Zafer.

Fix typo. From YOMURA Masanori in private mail.

Sort options. Various other fixes.

Add examples for scroll.fastlines and scroll.slowlines.
Also, bump the man page date.

ok wiz@, hubertf@

Show an example of turning off auto repeat.

Fix a typo and add an s.

Add an example for setting keyboard auto repeat rate.

Change the default controlling devices to /dev/wskbd and /dev/wsmouse
(instead wskbd0 and wsmouse0), this way changes will affect all devices
instead of just the first one.

Portuguese keyboards are supported to.
By Rui Paulo in PR 29884.

branches: 1.15.2;
Add 2004 to copyright notice as these has been significantly modified recently.

Add an example on how to change the kernel message colors. This is
illustrative because it shows the use of the '-d' flag and how one can
set multiple variables in the same run of wsconsctl(8).

Add comma in enumeration.

+ note finnish encoding
+ shuffle things around a bit, since the encodings we were listing
were not countries (most of them were languages)

branches: 1.11.4;
Some minor fixes from Soren Jacobsen in PR 21017.

.Nm does not need a dummy argument ("") before punctuation or
for correct formatting of the SYNOPSIS any longer.

New sentence, new line. From Robert Elz.

Sort supported languages, and sync them with reality, as suggested by
Julio Merino in bin/17993, with a minor correction.

Whitespace nits

Put the sections in the canonical order.
Fix formatting of '=' and '+='.
File names are .Pa, not .Ar.

Use full month names with .Dd, as per mdoc.samples(7).

Flesh out the manual page, add an examples section, and correct some of the
English.

Xref wscons wsconscfg wsfontload

Remove a slight ambiguity in the flag description.

wsconsctl(8) - a program to manipulate wscons devices.

- lacks wsdisplay support (driver needs work on ioctls).
- man page needs work.