stats: don't complain about pcr discontinuities

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
hlsfeed: display playback duration

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
curlhttpget: display total time of transfer

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
curlhttpget: pass info back to caller if requested

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>