From: Michael Hunold <hunold@linuxtv.org>

add a parameter to dvb_filter_pes2ts function to specify whether the packet
is a payload unit start or not.

new section demux code by emard

change license GPL -> LGPL for dvb_ringbuffer, like all other DVB core files

fix rare crash on invalid packets, patch by Asier Aguirre

i2c: copy the data variable as well on register client so that detach sees it.