mbuf_probe: auto detect some parameters
mbuf_probe should automatically fill in size for an existing mbuf where appropriate
for analyze, mbuf_probe should guess the structure if not given, first by looking at contents, and then maybe some heuristics by name: if local_dc in the name, then daq multicycle. if EDC or *_DAQ, then rmIpcStr. If _tp then TP_CFG, if *_awg then AWG_DATA.