Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

After r193232 rt_tables in vnet.h are no longer indirectly dependent on
the ROUTETABLES kernel option thus there is no need to include opt_route.h
anymore in all consumers of vnet.h and no longer depend on it for module
builds.

Remove the hidden include in flowtable.h as well and leave the two
explicit #includes in ip_input.c and ip_output.c.

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

Don't use touch when what is really meant is :> (create an empty file, or
truncate it if it exists) or :>> (ensure the file exists, but don't change
it if it already does)

Reviewed by: ru
MFC after: 2 weeks

Move the hard-coded ETHER_* options to where they belong --
inside !if defined(KERNBUILDDIR).

Utilize the fact the module will support all frames by default --
it needs no ETHER_* options unless some frames need to be disabled.

Fix the comment respectively.

Don't forget to create fake opt_ef.h if no ETHER_* are set.

MFC after: 3 days

Let modules use the kernel's opt_*.h files if built along with
the kernel by wrapping all targets for fake opt_*.h files in
.if defined(KERNBUILDDIR). Thus, such fake files won't be
created at all if modules are built with the kernel.

Some modules undergo cleanup like removing unused or unneeded
options or .h files, without which they wouldn't build this way
or the other.

Reviewed by: ru
Tested by: no binary changes in modules built alone
Tested on: i386 sparc64 amd64

Removed custom "load" and "unload" targets.

Removed "deinstall" targets -- the idea is to provide the standard
"deinstall" target.

Drop <bsd.man.mk> support from <bsd.kmod.mk>.

Not objected to by: -current

Use a consistent style and one much closer to the rest of /usr/src

Removed garbage (CFLAGS+= ${PROTOS} was a vestige of an old way of
configuring INET).

When manual pages are moved or removed, MANX should be changed
to NOMAN.

Reported by: bde

Move the ef(4) manual page from sys/modules/if_ef to share/man/man4, as
discussed with bp.

Use .include <bsd.kmod.mk> to get to ../../*/conf/kmod.mk instead of
encoding the relative path.

Pull in sys/conf/kmod.mk, rather than /usr/share/mk/bsd.kmod.mk.
This means that the kernel can be totally self contained now and is not
dependent on the last buildworld to update /usr/share/mk. This might
also make it easier to build 5.x kernels on 4.0 boxes etc, assuming
gensetdefs and config(8) are updated.

Uncomment ETHER_II frame and remove BPF related variable.

Allow if_ef driver to be compiled into kernel.

Add module for if_ef driver and make it compile.