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.

branches: 1.4.2; 1.4.4;
Remove comment, since there is no parsing anymore.

I should know better! Don't rely upon the way the shell implements
pipes. Skip the "error" printf from GetSmtId() as there is no easy
portable way to avoid it occurring (there are complicated ways) - but
we don't need it, there is no logical difference between "error" and ""
so just use the latter (if we get an ID, good, if there is nothing, then
there is none - saying 'error' does not mean anything.)

Restructure code a little.

Use quoting everywhere possibly useful (always the right way, except
in the few cases where it is wrong...)

Avoid using cut & grep (from /usr/bin) so script could run before /usr
is mounted (pity cpuctl is in /usr/sbin ...).

Use sysctl -n rather than attempting to parse its output.

Add smtoff, an rc.d script that disables Simultaneous Multi-Threading. It
parses the output of cpuctl, and executes "cpuctl offline" for each CPU
that has SmtID!=0.

The default is "smtoff=NO", which means that SMT remains enabled.