+ remove(NICKNAME, BNUM)
+
+ NICKNAME - Delete the user identified by NICKNAME in the
+ addressbook or, if NICKNAME is an array, all users indentified by
+ nthe nicknames in the array.
+
+ BNUM - ID of the backend, as returned by add_backend, to remove
+ the user(s) from.
+
+ This method will retrun true if the user(s) was removed, or false
+ if removal failed.
+
+
+ modify(NICKNAME, USERDATA, BNUM)
+
+ NICKNAME - Update the user identified by NICKNAME in the
+ addressbook.
+
+ USERDATA - Array with user data. The exisiting data for the user
+ will be replaced with this.
+
+ BNUM - ID of the backend, as returned by add_backend, to update
+ the user in.
+
+ This method will retrun true if the user was modified, or false if
+ something failed.
+