Edit the user's defined groups of friends.
Given several optional lists, will add/delete/update/rename the friends groups for a user.

&authInfo;

A structure of friend userids. The values of each are a string representing an unsigned 32-bit integer with bit 0 set (or the server will force it on anyway), bits 1-30 set for each group the friend belongs to, and bit 31 unset (reserved for future use).
Given the bit of a friend group, the value contains a structure of information on it.
Create or rename the friend group by sending this key. The value is the name of the group.
This field should be sent to indicate the sorting order of this group. The value must be in the range of 0-255. The default is 50.
If this is "1", then this group is marked as public. If public, other users can see the name of the group and the people that are in it.
A number of a friend group to delete (which can be from 1-30, inclusive). The server will modify all old entries that allow access to that friend group, so a new friend group using that number won't have access to old non-related entries. However, it is the client's responsibility to modify each friend's groupmask to remove them from the group as it's deleted.