cvs commit: src/sys/dev/ath if_ath.c src/sys/dev/ipw if_ipw.c src/sys/dev/iwi if_iwi.c src/sys/dev/ral rt2560.c rt2661.c src/sys/dev/usb if_ural.c src/sys/dev/wi if_wi.c src/sys/net bpf.c bpf.h bpfdesc.h if_disc.c if_gif.c if_gre.c if_loop.c if_sl.c ...

[Sam Leffler]

For the record we can eliminate the indirect ref through if_bpf if we
embed the structure in the ifnet.  For ifnet's that hookup to bpf this
is a no-cost improvement.  The downside is that ifnet's that don't work
with bpf incur the overhead for the structure despite not using it.  We
decided to do this change separately in case anyone has an argument
against it.

Comments?

	Sam