Allocate X68kKbdPriv dynamically to make it really private.

DEVICE_OFF and DEVICE_CLOSE operations are adjusted accordingly.
x68kGetKbdType() function is also added to get keyboard map type
specified in the config file.

Report which settings are chosen per a config file in the log file.

Also reorganize a logging strategy in parseError() and
make several variables and functions static or const.

Remove unnecessary pointer casts from malloc(3).

TAB/space cleanup.

Remove clause 3 and 4 from X68k server files written by Yasushi Yamasaki.

I've finally contacted with Yamasaki-san and he kindly answered
"no objection to change them to 2 clause license" in private mail.
Diffs to be committed have also been confirmed by him.
We appreciate all his contribution to early NetBSD/x68k.

Replace xalloc(), xrealloc() and xfree() with malloc(), realloc() and free().

Per following Xorg changes:
> Replace X-allocation functions with their C89 counterparts
http://cgit.freedesktop.org/xorg/xserver/commit/?id=3f3ff971ecff9936cebafc813af9193b97bba89c

Fix comment to sync with code.

Port the ancient Xsun based monolithic MD X68k server to X11R7, like Xnest.

Most diffs (API changes from xfree to xorg and some WARNSfy)
are mechanical. Confirmed working on X68030 and XM6i.

See my post on port-x68k@ for details:
http://mail-index.netbsd.org/port-x68k/2014/02/27/msg000043.html