s/diable/disable/ in comments.

Merge thorpej-cfargs2.

branches: 1.9.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.8.46;
Use %zu for size_t

- avoid an uninitialised variable warning
- fix a series of comparisions that duplicated one test and
did not test one variable (found by gcc set-but-unused.)
ok rkujawa

avoid uninitialized use of defattr

branches: 1.5.2;
- Map memory space with BUS_SPACE_MAP_LINEAR
- Support WSDISPLAYIO_GET_FBINFO
- Improve debugging

branches: 1.4.2; 1.4.4;
Add wsdisplay ioctls and support for mmap'ing of linear frame buffer.

Preliminary blitter support for Voodoo2.

Add 3Dfx Voodoo Graphics (aka Voodoo 1) support.

Add 3Dfx Voodoo2 driver. Still needs some cleanup and prettyfying, but hey
it works.