Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Rather than using hidden includes (with cicular dependencies),
directly include only the header files needed. This reduces the
unneeded spamming of various headers into lots of files.

For now, this leaves us with very few modules including vnet.h
and thus needing to depend on opt_route.h.

Reviewed by: brooks, gnn, des, zec, imp
Sponsored by: The FreeBSD Foundation

Fix world by including opt_route.h

- Add driver for Attansic L2 FastEthernet controller found on
Asus EeePC and some Asus mainboards.

Reviewed by: yongari, rpaulo, jhb
Tested by: many
Approved by: kib (mentor)
MFC after: 1 week