pcp

PM_TYPE_EVENT support - round four

• add helper functions
  int __pmCheckEventRecords(pmValueSet *) and
  void __pmDumpEventRecords(FILE *, pmValueSet *)
  to libpcp for processing the metric values that purport to be a packed
  array of event records ... the checking is of necessity paranoid in
  the extreme

• redefine the API for pmUnpackEventRecords to use a pmValueSet *,
  rather than a pmValueBlock * to allow the entire value of the
  metric to be validated and restructure implementation of
  pmUnpackEventRecords to use __pmCheckEventRecords and
  __pmDumpEventRecords (in the event of __pmCheckEventRecords finding
  a problem)

• pmlogger groks PM_TYPE_EVENT and emits metadata for all event parameter
  metrics

• include recently added man pages in the image build

• clean up some of the man page that need brief references to
  PM_TYPE_EVENT alongside PM_TYPE_AGGREGATE et al

• trivial change to genpmda to generate the stub code for PM_TYPE_EVENT

• add error injection code for sample PMDA and sample.event.records
  metric that is triggered by using pmstore to set sample.event.reset
  to a negative number (currently only -1 is implemented to generate
  a bad PMID for an event parameter)