jitterbuffer will now drop the first packet after a skew

Since 8d955fc3 the jitterbuffer will now drop the first packet after it has detected a skew.

I think this is the wrong behavior, since a skew can often come as a result of the sender restarting somehow, and then the first packet of this "new" stream could be very important information. (think video and I-frames as an example).

I have a test and revert to the old behavior here: !371 (merged)