Initial cut at anonymous metrics, adding pmRegisterAnon(void) to add
anonymous metrics (PMNS and metadata) built on top of derived metrics.
Changed the event records format so that event flags are supported for
each event record, and a meta-event record with special flags is used to
mark "missing" records in situ (rather than in the header of an array
of event records). Both changes need anonymous metrics.
Anonymous metrics - first attempt
Initial cut at anonymous metrics, adding pmRegisterAnon(void) to add
anonymous metrics (PMNS and metadata) built on top of derived metrics.
Changed the event records format so that event flags are supported for
each event record, and a meta-event record with special flags is used to
mark "missing" records in situ (rather than in the header of an array
of event records). Both changes need anonymous metrics.