system: exclude pchtherm thresholds

PR: https://forum.opnsense.org/index.php?topic=45484.msg227497#msg227497

Author: fichtner

src/opnsense/service/conf/actions.d/actions_system.conf

@@ -102,7 +102,7 @@ type:script
 message:Halt system
 
 [sensors]
-command:sysctl -aF | awk -F ": " '$2 ~ "^IK" { print $1 }' | grep -v -e "\._" -e "\.tjmax" | sort
+command:sysctl -aF | awk -F ": " '$2 ~ "^IK" { print $1 }' | grep -v -e "\._" -e "\.ctt" -e "\.[pt][m012]" -e "\.tjmax" | sort
 parameters:
 type:script_output
 message:Probing system temperature sensor location