<AuthBy PRESENCESQL> authenticates users from an SQL database and
records presence (current user location) to an SQL database. Implements a
special form of RADIUS Access-Request that allows user presence data to be
retrieved by suitably authorised devices.
This module can be used with telephone and VOIP systems to
automatically route telephone calls according to the user's current
location.
A sample configuration file and documentation can be found in
goodies/presencesql.cfg
in your distribution.