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

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

Remove missing include directory in preparation for adding
-Wmissing-include-dirs to CWARNFLAGS.

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

Remove netatm from HEAD as it is not MPSAFE and relies on the now removed
NET_NEEDS_GIANT. netatm has been disconnected from the build for ten
months in HEAD/RELENG_7. Specifics:

- netatm include files
- netatm command line management tools
- libatm
- ATM parts in rescue and sysinstall
- sample configuration files and documents
- kernel support as a module or in NOTES
- netgraph wrapper nodes for netatm
- ctags data for netatm.
- netatm-specific device drivers.

MFC after: 3 weeks
Reviewed by: bz
Discussed with: bms, bz, harti

Disconnect netatm from the build as it is not MPSAFE and relies on
NET_NEEDS_GIANT, which will shortly be removed. This is done in a
away that it may be easily reattached to the build before 7.1 if
appropriate locking is added. Specifics:

- Don't install netatm include files
- Disconnect netatm command line management tools
- Don't build libatm
- Don't include ATM parts in rescue or sysinstall
- Don't install sample configuration files and documents
- Don't build kernel support as a module or in NOTES
- Don't build netgraph wrapper nodes for netatm

This removes the last remaining consumer of NET_NEEDS_GIANT.

Reviewed by: harti
Discussed with: bz, bms
Approved by: re (kensmith)

Style: Remove blank lines before EOF.

Tested by: cvs diff -B

Add the module build stuff for the ATM call control module.

The layer 3 (signalling) of NgATM netgraph node: ng_uni. This node
handles user and network side signaling and partly PNNI.

Put the address handling, traffic descripto handling and the
message encoding and decoding stuff into the base module. All of this
is accessed by several of the NgATM modules and putting this into
atmbase reduceds the memory footprint.

Module build infrastructure for the NgATM SAA layer.

Add ng_atmpif: a HARP physical interface emulation. This allows one
to run the HARP ATM stack without real hardware.

Submitted by: Vincent Jardin <vjardin@wanadoo.fr>

This is a netgraph node to access ATM interfaces. It works with the
hatm(4) and fatm(4) drivers, en(4) will follow soon.