Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

wlandebug.8: remove Xref for missing manpages

Remove references for: athdebug(8), athstats(8) and wlanstats(8)

Those are tools in the tools/ directory that are not built as part of the base
system. According to the toolds/README file:

"...these tools are not meant to be built as part of the standard system..."

Even more, the tools/tools/README is not udpated and wlanstats does not even
built on current:

error: cast from 'struct sockaddr *' to 'const struct sockaddr_dl *' increases
required alignment from 1 to 2 [-Werror,-Wcast-align]

PR: 227174
Reported by: freebsd.org@alexandrews.me.uk
Reviewed by: gbe@ adrian@
Approved by: gbe@ (mentor) adrian@
Differential Revision: https://reviews.freebsd.org/D29033

Belatedly fix documentation on which interface to use as argument.

Fix stray "." left over from previous commit.

MFC after: 1 week

Fix Xref order in SEE ALSO.

MFC after: 1 week

Remove trailing whitespace per mdoc lint warning

Disussed with: gavin
No objection from: doc
Approved by: joel
MFC after: 3 days

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

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

add mesh support

Submitted by: rpaulo
Approved by: re (kib)

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

-d is a flag, not an argument. Use .Fl here.

Remove -, .Ar adds that automatically.

Pointed out by: brueffer

Bump document date for last change.

Allow wlandebug to set the default debug level which is inherited when vaps are
created.

Fix typos.

add man page