unused for now, but I plan to convert all programs in base to use it in
a future diff. /dev/bpf0 is for compatibility with existing binaries
and is to be removed after a transition period.
ok rpe krw, for the installer part
"Let's see it hit the tree." deraadt

OK dlg@ mpi@

discussed with rpe and halex

ok jasper@, patrick@, rapha@

ok rapha@

spotted by Nathanael Rensen, thanks!

mostly from armani.
ok miod, mpi, jsg and help from sthen

discussed with jsing and millert

explicitly. OK dlg@ & todd@

Prodded by jmc@.

General huzzahs.
"go for it" deraadt@

ok todd@ krw@ deraadt@

get it in! jsing@

ok miod@, deraadt@, todd@.

armish, landisk and zaurus. Also fix corresponding .Xr in MAKEDEV.8
ok miod@, todd@

all-in-one usb card readers and memory sticks you run out of sd
device files very quickly with default install.
This doesn't affect install media.
ok krw@ miod@

"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@

prompted by/ok dlg@ deraadt@

grudgingly ok deraadt@

as /dev/raid).
ok drahn@

with a specific manpage reference.

ok drahn@, deraadt@