Restrict how many packet callbacks can be called

[harlowja]

Sometimes you only want to unpack 3 (for example) objects from a stream and stop unpacking after that many, it appears the current StreamProtocolHandler will continue unpacking forever, vs unpacking 3 and then stopping. It'd be nice to be able to restrict it to a given amount of unpacks (and default to infinite to retain the existing behavior)

[posborne]

Interesting. I wonder if this might be better handled outside of Suitcase? Presumably, once you have received N packet callbacks, you could just stop feeding in bytes to feed().

What would "stopping" after 3 frames look like? How would the behavior of feed() change?

[harlowja]

Ah, good point, might not be needed.