Sub-Wiki access rights
Version 3.1 by Irina Hrehorciuc on 2016/03/18
To change rights for a sub-wiki, log in as administrator, click the 
button, then on "Administer Wiki".
In the wiki preferences page, click on the "Rights" link in the vertical menu to the left.
Select the local or global groups and users for which you want to set a permission.
Click once on a check-box to allow a right, twice to deny it and three times to clear the right and use the default values. Note that rights entries are saved automatically.
