rc.suspend/rc.resume acpi support added

I added support for acpiconf(8) to call the rc scripts on the suspend and
resume paths.  Since they were apm-specific before, some changes have been
made to them.  I would appreciate it if users with working APM and ACPI
suspend and resume would install the new scripts and test them.  For apm,
behavior should be exactly the same.  For ACPI, logger and sync are now
called on the suspend and resume path but hopefully that will not reveal
any pre-existing problems.  :)

This helps for uhci where we have to unload and reload usb.ko across
suspends since it doesn't re-initialize correctly.  See the usb comments
in the files for an example.

-Nate