netgraph: increase size of sockaddr_ng to match maximum node name

The ng_socket(4) node already writes more than declared size of the
struct at least in the in ng_getsockaddr(). Make size match size of
a node name. The value is pasted instead of including ng_message.h
into ng_socket.h. This is external API and we want to keep it stable
even if NG_NODESIZ is redefined in a kernel build.

Reviewed by: afedorov
Differential Revision: https://reviews.freebsd.org/D42690

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

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

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

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.

Make the sg_len and sg_family members of the sockaddr_ng the same type
as the corresponding values in sockaddr are.

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

Use a single style of multiple inclusion protection for Netgraph headers.

Reviewed by: archie, harti, emax

Since neither archie nor I work at Whistle any more, change our email
addresses to be the more usefu @freebsd.org ones
so we can keep getting bug-reports.
- man pages to follow..

Fixes from brian. With some changes from me.
Allows FreeBSD to run as a PPPOE server
One patch still not included.

Add the option for a socket node to shut down when the last hook
to an adjoining node is removed. Also move file scope definitions back
within the file, and remove un-needed include file.

Whistle's Netgraph link-layer (sometimes more) networking infrastructure.
Been in production for 3 years now. Gives Instant Frame relay to if_sr
and if_ar drivers, and PPPOE support soon. See:
ftp://ftp.whistle.com/pub/archie/netgraph/index.html
for on-line manual pages.

Reviewed by: Doug Rabson (dfr@freebsd.org)
Obtained from: Whistle CVS tree