Remove $FreeBSD$: two-line nroff pattern

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

nfsuserd.8: Change machines to machine's

Change machines to machine's.

Suggested by: grahamperrin
Differential Revision: https://reviews.freebsd.org/D39877

nfsuserd.8: Substitute server for slave terminology

Commit 33906122e1ff replaced the use of "slave" with "server"
for nfsuserd.c. This patch does the same for nfsuserd.8.

Discussed with: karels
Differential Revision: https://reviews.freebsd.org/D39877

Fix a few mandoc issues

- no blank before trailing delimiter
- whitespace at end of input line
- sections out of conventional order
- normalizing date format
- AUTHORS section without An macro

Delete the BUGS entry related to failing when jails are enabled.

r345994 has finally fixed the bug that caused the nfsuserd(8) daemon to
fail when jails were enabled, so delete the BUGS entry from the man page.

PR: 205193
MFC after: 2 weeks

Fix the nfsuserd.8 man page for the changes made to support uid/gid
numbers in owner and owner_group strings.

This is a content change.

Revert r320758, which was the man page update for r320757 just reverted.

This is a content change.

PR: 230752

Document the changes done to nfsuserd by r320757.

This is a content change.

Add a Bugs section that indicates that the nfsuserd doesn't work
when jails are being used on the system.
It is hoped that the patches in PR#205193 will someday get tested/debugged
so that they can be committed to fix this.

This is a content change.

PR: 205193
MFC after: 2 weeks

Get rid of bogus statement in the nfsuserd.8 man page.

The nfsuserd.8 man page stated that a usertimeout of 0 would disable
the cache timeout. This was simply not true, so this patch deletes
the sentence.

This is a content change.

PR: 217406
MFC after: 2 weeks

Document the new "-manage-gids" option for the nfsuserd daemon.
This is a content change.

Suggested by: jpaetzel
Tested by: jpaetzel
MFC after: 2 weeks

mdoc: sort SEE ALSO.

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

Fix typos and spelling mistakes.

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 two new utilities and two new daemons to /usr/src/usr.sbin that
are specifically used by the experimental nfsv4 subsystem.
nfscbd - The NFSv4 client callback daemon.
nfsuserd - The NFSv4 daemon that maps between user and group name
and their corresponding uid/gid numbers.
nfsdumpstate - A utility that dumps out the NFSv4 Open/Lock state.
nfsrevoke - Administratively revokes an NFSv4 client, releasing all
NFSv4 Open/Lock state it holds on the server.

Approved by: kib (mentor)