Add 'include' functionality for sensors.conf

[mmh]

Add the ability to 'include' other files from sensors.conf. See the mailing list archives for a discussion of this feature.

[khali]

I have been thinking about this for some time now. I am not sure that adding an "include" keyword to sensors.conf, as had been discussed, is the best way to go.

What about having a /etc/libsensors.d directory that would work the same way as /etc/modprobe.d (and many other similar configuration directories) work? The user could simply drop board-specific configuration files there, and libsensors would take care of processing all the files it finds in this directory.

The advantage over adding an "include" keyword are:

• No configuration file syntax change. This syntax change would cause new configuration files to fail on systems with an older version of libsensors.
• No need for the user to maintain a central sensors.conf that includes his/her board-specific configuration files.
• No need to deal with recursion depth issues.

One drawback I can think of is a worse control of the inclusion order. I am not sure if it really matters in practice though, and if it does, we can probably work around it by having libsensors process files in a well-defined order.

[khali]

Implemented in r5647.