run sysctl early enough.

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

don't bother warning about obsolete $defcorename and $nfsiod_flags;
postinstall now checks for these

clean up warnings.
don't bother setting defcorename from obsolete $defcorename.

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.

migrate raising of securelevel from sysctl to separate securelevel script.
the latter depends upon aftermountlkm (but is required by DAEMON), so that
lkms may be loaded before the securelevel is raised.
noted by Rafal Boni <rafal@mediaone.net> in [bin/10780]

branches: 1.8.2;
add rc.d/ipsec for ipsec configuration. when enabled, it will inject
/etc/ipsec.conf into "setkey -f". PR 9609.

branches: 1.7.2;
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.

This was doubly borken...

Only warn on non-default old nfsiod args.

Death to nfsiod!

It is replaced by kernel threads that do the same thing. The number of
kernel threads used is set with the vfs.nfs.iothreads sysctl.

Improve backwards compatability and leave securelevel the old way.

The file /etc/sysctl.conf is now run with sysctl -f at boot time.
This replaces the previous /etc/rc.d/sysctl. Also, the variables are now
set earlier, between ipf/ipnat and the network coming up.

The rc.conf defcorename and securelevel variables are no more. You can
set them directly in sysctl.conf now.

branches: 1.1.1;
Initial revision