Add Backtab key, based on a change from Crystal Kolipe kolipe.c at
exoticsilicon dot com.

ok miod

Attempt to make user changes of keyboard layout a bit more `sticky' on wsmux
kernels:
- keyboard drivers will now tell wskbd if the keyboard layout they ask
for is a default value, or a value they are 100% sure of (either
because your kernel has a XXXKBD_LAYOUT option, or because the
driver can tell the keyboard layout, e.g. by the country code on USB
keyboards which provide it, such as Sun's)
- when attaching a keyboard with a non-default layout, the layout will
become the default layout of the mux for new keyboard attachments if
the mux doesn't have a layout set already.
- when changing the keyboard layout of a particular keyboard with an
ioctl (i.e. using kbd(8) or wsconsctl(8)), the layout will become the
default layout of the mux for new keyboard attachments.

ok mpi@

Fix asterisk symbol in de layout.

ok miod@, pointed Stefan Koerner <stefan dot koerner at pilum-tech dot de>

Report the compose key on sun keyboards in raw mode as a different keycode
from right alt. ok krw@ shadchin@ deraadt@

Remap the audio mute key on type 5, as it collides with the keypad equal
key on type 4.

WSDISPLAY_COMPAT_RAWKBD support for sun serial keyboards (zskbd, comkbd).

Factorize most of the high-level logic for Sun serial keyboards in
sys/dev/sun/sunkbd.c, and move the layout tables to sys/dev/sun/sunkbdmap.c.

No functional changes, small sparc64 kernel shrinkage.

Attempt to make user changes of keyboard layout a bit more `sticky' on wsmux
kernels:
- keyboard drivers will now tell wskbd if the keyboard layout they ask
for is a default value, or a value they are 100% sure of (either
because your kernel has a XXXKBD_LAYOUT option, or because the
driver can tell the keyboard layout, e.g. by the country code on USB
keyboards which provide it, such as Sun's)
- when attaching a keyboard with a non-default layout, the layout will
become the default layout of the mux for new keyboard attachments if
the mux doesn't have a layout set already.
- when changing the keyboard layout of a particular keyboard with an
ioctl (i.e. using kbd(8) or wsconsctl(8)), the layout will become the
default layout of the mux for new keyboard attachments.

ok mpi@

Fix asterisk symbol in de layout.

ok miod@, pointed Stefan Koerner <stefan dot koerner at pilum-tech dot de>

Report the compose key on sun keyboards in raw mode as a different keycode
from right alt. ok krw@ shadchin@ deraadt@

Remap the audio mute key on type 5, as it collides with the keypad equal
key on type 4.

WSDISPLAY_COMPAT_RAWKBD support for sun serial keyboards (zskbd, comkbd).

Factorize most of the high-level logic for Sun serial keyboards in
sys/dev/sun/sunkbd.c, and move the layout tables to sys/dev/sun/sunkbdmap.c.

No functional changes, small sparc64 kernel shrinkage.