Signed-off-by: David Fuhrmann <dfuhrmann@videolan.org>

if Realloc fails, we are anyway screwed and most of the code doesn't
chec check for Realloc failures even in this module.

That should help failing safe to software decoding if the graphic card
has too little free memory. Old cards with only 256 MiB are commonly
affected by that problem.

This seems necessary to maintain the mapping of libav's packet stream
index to the VLC plugin's tracks table offset.

strncpy triggers warning because the
struct is nonzero terminated.

There's no reason to wait 6 sec for a reply
to a spontaneous ping. The reply has no
relation with the 5 sec keepalive ping sent from
the receiver.

The function remain fundamentally ToCToU-prone, but at least they now
follow the memory model.

Loading the open nib can take some significant time, due to audio/
video devices enumeration.

refs #12123

Stop sending and disconnect when app has changed.

close #12014