datapipes: correctly initialize and set nextStartDetected to
avoid false alarms.
Slight change to debug output
Statistics: add support for Event ID mismatch counting
datapipes: add (asynchron) check for event ID mismatches. This
means we count event IDs per TBM channel up and compare to the
one delivered by the TBM.
To do:
* reset the counter as soon as we found a TBM reset
* maybe somehow correlate the different readout channels?
* define what happens if we findn a mismatch. Insert empty event?
datapipes: add some more interesting DEBUGPIPES-level output,
printing the full decoded TBM header and trailer contents