No longer use obsolete test "-a" option - use sh && instead.

Securelevel might not be present, properly complain instead of printing
error messages from sysctl(8).

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

Use new style command substitution.

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 REQUI

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.

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clean up a little:
- don't set the securelevel to the same thing
- don't try to lower the securelevel

inspired by PR#13647

REQUIRE ipnat and mountd.
fixes PRs [misc/10958] and [misc/10959] by Mike Santos <mike@ethmoid.org>

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 rais

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]

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