o Add suspend() method to stop RTP generation while keep data   accumulating queue and counters ticking, so that we can cope   with the session being dropped while trying to reconnect.
o Add suspend() method to stop RTP generation while keep data
  accumulating queue and counters ticking, so that we can cope
  with the session being dropped while trying to reconnect.

o Extend self-test code to check PPS and also suspend/resume.

sippy/b2bua,sippy/b2bua