Added control of active and passive limit temperatures to power_profile, enabling switch between active and passive cooling based upon AC power status.

Having this work spread between different patches for such a long time has made it hard for me to track and maintain it. I'm going to merge it with D35704.

I do very much appreciate the thoughtful reviews. Thank you.

I've given this a little more thought. I don't think it's appropriate to use hw.acpi.suspend_state (or hw.acpi.standby_state) in this case.

• Modified (further) in response to reviews for D35983 (forgot to bump date).

• Modified in response to reviews for D35983.

• Modified to address review comments from D35982

This is a good question. According to the specification, we should use S3 unless the FADT LOW_POWER_S0_IDLE_CAPABLE flag is set. If the flag is set, we can use 'an equivalent low power state'. The flag indicates that 'S0 idle achieves savings similar to or better than those typically achieved in S3'.