Merge pull request #509 from lr1980/patch-1

Update powered_up_

plugins/harddisks/powered_up_

@@ -2,7 +2,10 @@
 #%# family=auto
 #%# capabilities=autoconf suggest
 
-device=`echo $0 | cut -d _ -f 3`
+device=`basename $0 | sed 's/^powered_up_//g'`
+if [ ! -e /dev/$device ]; then
+        device="disk/by-id/$device"
+fi
 
 case $1 in
    config)