Fix to documentation of usermgmt::useraccount.

The documentation comment of the usermgmt::useraccount definition
was still talking about the old global $user_enabling_groups variable,
instead of the usermgmt::config parameter of the same name.  Fix this.

manifests/useraccount.pp

@@ -15,11 +15,10 @@
  *  - The 'ensure' parameter must be set to 'enabled'.
  *
  *  - In addition, the user must belong to one of the groups listed in
- *    the (node-)global variable $user_enabling_groups, or in the variable
- *    $usermgmt::config::default_enabling_groups.  (Note that the primary
- *    group of users, i.e. the one with the same name as the user, is also
- *    usable in this list.)  The wildcard group "*" matches any group
- *    (including the primary group).
+ *    the enabling_groups parameter of usermgmt::config.  (Note that the
+ *    primary group of users, i.e. the one with the same name as the user,
+ *    is also usable in this list.)  The wildcard group "*" matches any
+ *    group (including the primary group).
  *
  *    Negative entries, on the form "-group", means to disable users who
  *    are members of that group.  The negative wildcard "-*" can also be
@@ -74,7 +73,7 @@
  *
  *  - ensure	One of "enabled", "disabled", "absent", or "disable_existing".
  *		Modified based on the value of the $groups parameter
- *		and the global variable $user_enabling_groups (see above).
+ *		and the $usermgmt::config::enabling_groups setting (see above).
  *		- enabled
  *		    Create user normally.  Note though that this does not
  *		    automatically enable the user to log in; root must