Assume WSMOUSE_TYPE_TPANEL if calibration data is present and the device
is in raw mode. The WSMOUSEIO_GTYPE ioctl may not return the correct type
on a wsmux if there is a mix of absolute and relative pointers attached.

Reverts "xf86-input-ws: Port auto-calibration bits from xf86-input-mouse".

Suggested by uwe@

xf86-input-ws: Port auto-calibration bits from xf86-input-mouse.

Needed for absolute input devices where pointer coordinates do not
match the display size.

Tested by jmcneill.

xf86-input-ws: implement support for WSCONS_EVENT_(H|V)SCROLL.

adapted from the OpenBSD code.

fix various errors and warnings with xorg-server 1.20:

- no Error() in scope
- more wakeup/blockhandler ABI changes
- more notify fd API changes
- more xf86CursorResetCursor changes
- lots of char* -> const char*
- fix ati kms config.h now HAVE_XF86_CURSOR_RESET_CURSOR is available
- another xf86GetOS() is removed fix
- OsBlockSIGIO() etc, -> old, but still around API until properly converted
- don't free const char * data owned by some other system

apply const from xorg-server 1.18

initial import of xf86-input-ws from openbsd-current xenocara, with
xorg 1.10 input fixes.

initial import of xf86-input-ws, from OpenBSD