For a full example, see
                  goodies/plmndb.cfg.
                  PLMNDatabaseSQL supports a number of SQL
                  configuration parameters that are common to all Radiator's SQL based
                  modules. These are documented in the Radiator reference manual.
               At a
                  minimum DBSource and other SQL access parameters must
                  be configured. SQL query that fetches the PLMN information and the
                  interpretation of the query results are currently not configurable. When
                  RefreshPeriod is not configured, the PLMN parameters
                  are loaded only once when Radiator starts.
               <PLMNDatabaseSQL>
   # Identifier is used by MAP and PeerSP clauses to refer to this
   # clause when looking up PLMN information for an IMSI.
   Identifier plmndb-sql
   DBSource dbi:mysql:plmndb
   DBUsername mikem
   DBAuth fred
   # Reread PLMN information every two hours
   RefreshPeriod 7200
</IMSICrypt>
<MAP>
   # Other MAP configuration parameters
   PLMNDatabase plmndb-sql
</AuthBy>