Rename MOUNTCRITLOCAL to CRITLOCALMOUNTED to avoid a name collision
on case insensitive file systems

Split the local disk availability step into two phases to allow scripts
that pre-populate parts of the system (e.g. a tmpfs based /var) an
easy place to plug in like:

# REQUIRE: mountcritlocal
# BEFORE: MOUNTCRITLOCAL

This also cleans up the existing special handling a bit by separating it
into new scripts. All later scripts now depend on MOUNTCRITLOCAL.
Discussed on tech-userlevel some time ago.

Revert previous as it introduces "Circular dependency on provision
`mountcritremote'".

route6d is "BEFORE: NETWORKING" and was made to "REQUIRE: mountcritremote",
but mountcritremote "REQUIRE: NETWORKING".

Make route6d REQUIRE: mountcritremote.

route6d is in /usr/sbin, and thus on systems with separate / and /usr,
/etc/rc.d/route6d can be run before /usr is mounted, resulting in
route6d mysteriously failing to start.

The "routed" and "route6d" scripts must be run early during system startup
because they are part of the network initialization. Use similar
dependences as the "rtsold" script.

This should fix PR misc/36171.

branches: 1.6.2; 1.6.4; 1.6.8; 1.6.10;
Add an _rc_subr_loaded variable, set to ":" by rc.subr. Scripts can use this
for a speedup by doing:
$_rc_subr_loaded . /etc/rc.subr

Correct the "direction" of the barrier dependencies (DAEMON, LOGIN,
NETWORKING, and SERVERS) by specifying that certain things should
come BEFORE a given barrier, rather than having the barrier REQUIRE
a service. This allows scripts to be removed without having to
edit the barrier dependencies.

As discussed on tech-userlevel, and approved by Luke.

- only perform the checkyesno on the variable named in $rcvar (rather than
implicitly using $name if $rcvar isn't set), and always perform this check,
even when using start_cmd (et al).
this check is performed before the pidcmd
is run, speeding up scripts that weren't going to be run anyway.
this should speed up booting slow systems.

- take advantage of the above and remove
start_precmd="checkyesno foo"
in scripts that use start_cmd.

- explicitly set rcvar=foo in the rc.d/foo scripts which have an equivalent
rc.conf entry

- fix `rcvar' and `restart' when $rcvar isn't set.
these above changes fix PR [bin/11027].

- when doing `force*', ignore the return value of *_precmd.
this fixes PR [bin/10781].

- rename what sysdb provides from `databases' to `sysdb', to reflect
the name of the script.

- improve the comments in rc.subr

branches: 1.3.4;
Use load_rc_config() (from rc.subr) instead of sourcing /etc/rc.conf.
This allows us or a user to change the configuration file method in
one place - rc.subr - without having to edit all of the rc.d/* files.

* replace daemon, login, servers with DAEMON, LOGIN, SERVERS
* remove sshd (it was from my private system)

branches: 1.1.1;
Initial revision