Youness Alaoui authored Apr 15, 2014 and Olivier Crête committed May 17, 2014

In the case of TCP-ACTIVE, we don't have a problem, because the new
socket will generate a  peer-reflexive candidate with the right
sockptr, and all sends will go through it, but for TCP-PASSIVE, there
is no peer reflexive candidates, so once the pair is selected, the local
candidate will point to the TCP-PASSIVE candidate with the TCP_PASSIVE
socket type which will cause all sends to fail, so we need to proxy
them to the child connections