Include user management part from wiki

http://wiki.phpmyadmin.net/pma/user_management

doc/privileges.rst

@@ -0,0 +1,50 @@
+User management
+===============
+
+User management is the process of controlling which users are allowed to
+connect to the MySQL server and what permissions they have on each database.
+phpMyAdmin does not handle user management, rather it passes the username and
+password on to MySQL, which then determines whether a user is permitted to
+perform a particular action. Within phpMyAdmin, administrators have full
+control over creating users, viewing and editing privileges for existing users,
+and removing users.
+
+Within phpMyAdmin, user management is controlled via the :guilabel:`Users` link
+from the main page. Users can be created, edited, and removed.  
+
+Creating a new user
+-------------------
+
+To create a new user, click the :guilabel:`Add a new user` link near the bottom
+of the :guilabel:`Users` page (you must be a "superuser", e.g., user "root").
+Use the textboxes and drop-downs to configure the user to your particular
+needs. You can then select whether to create a database for that user and grant
+specific global privileges. Once you've created the user (by clicking Go), you
+can define that user's permissions on a specific database (don't grant global
+privileges in that case). In general, users do not need any global privileges
+(other than USAGE), only permissions for their specific database.
+
+Editing an existing user
+------------------------
+
+To edit an existing user, simply click the pencil icon to the right of that
+user in the :guilabel:`Users` page. You can then edit their global- and
+database-specific privileges, change their password, or even copy those
+privileges to a new user.
+
+Deleting a user
+---------------
+
+From the :guilabel:`Users` page, check the checkbox for the user you wish to
+remove, select whether or not to also remove any databases of the same name (if
+they exist), and click Go.
+
+Assigning privileges to user for a specific database
+----------------------------------------------------
+
+Users are assigned to databases by editing the user record (from the
+:guilabel:`Users` link on the home page) not from within the :guilabel:`Users`
+link under the table. If you are creating a user specifically for a given table
+you will have to create the user first (with no global privileges) and then go
+back and edit that user to add the table and privileges for the individual
+table.

doc/user.rst

@@ -5,4 +5,5 @@ User Guide
     :maxdepth: 2
 
     transformations
+    privileges
     other