reduce more .Nd to one line and kill more .Tn

make -column lists pretty again;

specifically, rewrite them to permit some markup in the column headers,
and use "Ta" instead of literal tabs; mandoc does not currently match groff
100%, but a mando

make -column lists pretty again;

specifically, rewrite them to permit some markup in the column headers,
and use "Ta" instead of literal tabs; mandoc does not currently match groff
100%, but a mandoc fix may be some time off, and we've gone enough releases
with poorly formatting column lists.

in some cases i have rewritten the lists as -tag, where -column made
little sense.

show more ...

Do not use spaces for holes in jumper layouts, as this causes the html
rendering of the manual pages to be useless.

no sense for devices to reference other (same type) devices;
requested by deraadt/miod
help/ok miod

Not-functional-enough driver for the Sun Expert3D cards, put in tree as an
incentive for further tinkering only; not for the faint of heart.

convert to new .Dd format;

Now that xbox sort-of works on sparc64, port the cgtwelve driver, since
the only way to connect it to a sparc64 machine is via an xbox device.

Port the remaining two sbus framebuffer drivers to sparc64; tvtwo untested
due to lack of hardware.

kill default locators

agten(4) documentations updates.

mgx(4) documentation updates.

Documentation updates for rfx(4) on sparc64.