Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Prefer echo over printf

Forced commit, to provide correct commit message for r201440:

Don't complain when we encounter the "cache" source, it's valid. Also fix
the error message to include a line feed and not include a stray comma.

PR: bin/121671
Submitted by: Artis Caune artis.caune gmail.com
Approved by: ed (mentor)
MFC after: 2 weeks

While here, change "> /dev/stderr" for more usual ">&2"

Submitted by: jilles

The default hash table size is 257 not 255. Reword the rest of the line
slightly while here.

PR: bin/121671
Submitted by: Artis Caune artis.caune gmail.com
Approved by: ed (mentor)

As previously discussed, add the svn:executable property to all scripts

Eliminate global symbols starting with an underscore from rc.d
scripts, except for mdconfig* and jail. Such symbols are reserved
for the rc.subr internals. Most scripts can be fixed by just
declaring _foo symbols as local: few scripts actually need them to
be global.

Discussed with: dougb in freebsd-rc

Install /etc/nsswitch.conf statically rather than generating it at
boot. Autogeneration of nsswitch.conf doesn't makes sense in 7.0
since it's not permitted to upgrade from a pre-nss release without
passing through an intermediate release.

Suggested by: brooks

Update host.conf every time nsswitch.conf changes, instead of just creating
it if it does not exist.

Submitted by: Rostislav Krasny <rosti.bsd@gmail.com>
MFC after: 2 weeks

Oops, services should be compat by default for backward compatibility.

Add newly supported databases such as services, protocols and rpc
into generated nsswitch.conf.

Remove an inappropriate comment which is put into generated
host.conf. Someone may want to edit it later.

Requested by: Rostislav Krasny <rosti.bsd__at__gmail.com>

- Replace awk parts with shell.

Approved by: brooks
MFC after: 2 weeks

Remove the requirement for the FreeBSD keyword as it no longer
makes any sense.

Discussed with: dougb, brooks
MFC after: 3 days

Fix requirement of `network' to `NETWORK' because the former isn't
provided by any rc.d script.

Approved by: mtm

Correct an error carried over from the nsswitch.conf(5) manual page; add
a note to UPDATING since users may have to manually remove an incorrect
nsswitch.conf.

Noticed by: simon

If nsswitch.conf does not exist, create it with the default settings.
The reason for doing this is that (at least some) 4.x binaries are very
unhappy if host.conf does not exist, and if we create host.conf but not
nsswitch.conf, nsswitch.conf will be created at the next reboot, so it
is better to create a correct nsswitch.conf right away.

Move the task of updating nsswitch.conf / host.conf into a separate
script called nsswitch.