setting an envsys temperature limit (was: removing an envsys temperature limit)

[Edgar Fuss <ef%math.uni-bonn.de@localhost>]

> So, this is about the 45degC CritMin part?  I see.
Yes.

> I am curious on your resolution -- when you modify these limits
> through envsys, the values are supposed to get written back into the
> chip (http://bxr.su/n/sys/dev/i2c/dbcool.c#dbcool_set_temp_limits).
> 
> Do they persist between the reboots and cold boots?  Or does CritMax
> change back to 54degC at certain times?
I didn't try reboots, but setting it in envsys.conf seems to work just fine.