This object when set to 'true' enables the GGSN to copy
the SGSN list for charging release prior to release 4
(cgprsCgRelease). The SGSN change limit trigger
specified in the object cgprsCgCdrSgsnChangeLimit has to be
set as well.
If this object is set to 'false'-current SGSN address may not
be present in CDR.
This object can be set to true only when the object
cgprsCgPartialCdrGenEnable is set to 'true'.