Update powerwall.sh

powerwall.sh

@@ -20,8 +20,8 @@ CHECKTEMP(){
 	cw=25;
 	while [ $# -gt 0 ]; do
 		case "$1" in
-			-avg) avgdays=${2};;
-			-search) search=${2};;
+			-a|-avg) avgdays=${2};;
+			-s|-search) search=${2};;
 		esac
 		shift 1
 	done