Use jailroot variable everywhere

templates/jail

@@ -25,7 +25,7 @@ if not id:
             exit(1)
     else:
         id = extras.pop(0)
-path = '/jails/' + id
+path = '{{ jailroot|default("/jails") }}/' + id
 if not os.path.exists(path):
     print('Jail %s not found' % id)
     exit(2)