Eliminate duplicate shell commands from history file. Feature #12741
Eliminate duplicate shell commands from history file. Feature #12741

dennypage/pfsense,pfsense/pfsense,dennypage/pfsense,pfsense/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense,pfsense/pfsense,pfsense/pfsense,dennypage/pfsense,dennypage/pfsense,NewEraCracker/pfsense