sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

net: clean up empty lines in .c and .h files

Add XMIT_FAILOVER transmit algorithm to ng_one2many node. Packets are
delivered out the first active "many" hook.

PR: kern/137775
Submitted by: Maxim Ignatenko
MFC after: 2 weeks

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

- Import the HEAD csup code which is the basis for the cvsmode work.

/* -> /*- for license, minor formatting changes

Introduce new failure detection algorithm, called NG_ONE2MANY_FAIL_NOTIFY.
It means, that node listens to flow control messages from downstreams
and removes link from list of active links whenever a LINK_IS_DOWN message
is received. If LINK_IS_UP message is received, then links is put
back into list of active links.

Approved by: julian (mentor), implicitly
MFC after: 1 week

Backout previous change, it breaks build and it is not needed
layering violation. As pointed out, there is much better way to do this.
Sorry guys, I need to find a better way to force reviews.

Requested by: harti, julian, scottl (mentor)
Pointy hat to: pjd

Add new failure detection algorithm.
It works as follows:
In every 'interval' seconds defined links are checked.
If they are non-active they will not be used by to data transfer.

No response from: julian, archie
Silent on: net@
Approved by: scottl (mentor)

Fix GCC warnings caused by initializing a zero length array. In the process,
simply things a bit by getting rid of 'struct ng_parse_struct_info' which
was useless because it only contained one field.

MFC after: 2 weeks

Add a new distribution algorythm to the 'one2many' node type.
The new method is 'flood' (in addition to the old round-robin)
in which incoming packets are sent to more than one outgoing hook.
(I'm not sure what Rogier is using this for but it seems generally useful
and isn't much extra)

Submitted by: Rogier R. Mulhuijzen (drwilco@drwilco.net )

Fix bug in parse type for struct ng_one2many_config.

Reported by: Yian Zhu <Yian.Zhu@qobra.com>

New netgraph node type ng_one2many(4).