ACPI problem reports

If you are currently having ACPI problems, please submit a PR through the
send-pr mechanism.  After you have been assigned a number, please report
it to acpi-jp_at_jp.freebsd.org.  Information to include is a full dmesg of
your system and links to the output of:
  acpidump -t -d -o my.dsdt > my.asl

In preparation for 5.2R, PRs will be prioritized in the following order:
  1. Panics/system crashes that are unavoidable
  2. Same but avoidable (i.e. by disabling certain subsystems)
  3. Features not working (battery, powerdown, but not suspend)
  4. Feature requests and suspend/resume problems

Thanks,
-Nate