"Special purpose devices" section, since a hardware driver which uses
video(4) also could be none-USB as long it uses the V4L2 API.
OK todd@

get it in, deraadt@

ok deraadt@, marco@

please commit from deraadt@

bootblocks have been moved, but we want 4.2 to be upgradeable.  So
reduce the footprint of the bsd.rd by shrinking the ramdisk filesystem
because it is way too large.  tested by sthen and kettenis

make the installation media's life easier:
- stop using ``Pc'' as a getty terminal type, use std.9600 instead.
- on platforms with multiple virtual consoles (alpha, amd64, i386,
zaurus), console is disabled, various ttyC* are enabled.
- on other platforms, console is enabled, all other devices are
disabled. This only changes armish, mac68k, sgi.
- default terminal for console is unknown on serial-only machines, vt220
on glass-capable machines (questionable, but done for consistency).
- minor whitespace changes.
- glass console forgotten on a couple platforms (luna88k, sparc64, vax).
eyeballed by deraadt@, ok krw@

ok miod@

prompted by/ok dlg@ deraadt@

grudgingly ok deraadt@

pave the way for future work; ok since this does not change the generated
MAKEDEV

ok mickey@

same rules to both wskbd0:wskbd and wsmouse0:wsmouse; miod ok