Ignore EPERM from sysctl(3).  It is returned when passive cooling is active.
Ignore EPERM from sysctl(3).  It is returned when passive cooling
is active.

Reviewed by:	njl

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase