Support for chassis intrusion detection

[khali]

libsensors 3 lacks support for chassis intrusion detection. Some chips had it in libsensors 2, so this is a small regression.

What needs to be done, in order:

1. Define a standard sysfs interface for the feature.
2. Fix all drivers so that they comply with the new standard.
3. Add support in libsensors.
4. Add support in sensors.

[khali]

Discussed on the mailing list at:
 http://lists.lm-sensors.org/pipermail/lm-sensors/2009-February/025357.html

[khali]

New proposal at:
 http://lists.lm-sensors.org/pipermail/lm-sensors/2009-March/025541.html

[khali]

Second proposal accepted, interface definition is now upstream:
 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ec19920944246b4686c7772a58507a20c361dc9d

Step 1 done.

[khali]

User-space support added in r5879 (libsensors) and r5880 (sensors).

Driver changes are pending review and should be in linux-next soon.

[khali]

Driver fixes are upstream now ( adm9240,  w83792d,  w83793).