Rewrite add user to reflect changes in adduser syntax

seqs/kodi.sh

@@ -33,10 +33,10 @@ step_3() {
     return 0
   fi
   exe adduser \
-    --disable-password \
+    --disabled-password \
     --gecos "User to run $toolName Media Center" \
-    -G audio,video,plugdev,input,tty \
     $toolUser
+  exe usermod -a -G audio,video,plugdev,input,tty $toolUser
   saveReturn $?
   endReturn
   echo "User $toolUser details:"
@@ -127,5 +127,5 @@ step_7() {
   esac
 }
 
-VERSION_SEQREV=4
-. sequencer.sh
+VERSION_SEQREV=10
+. /usr/local/bin/sequencer.sh