Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

The CSD is now split into several ones, therefore there is one CSD per H264
Parameter Sets (SPS and PPS).

There is now only one way to send a CSD. It's sent via PutInput with the
BUFFER_FLAG_CODEC_CONFIG flag.

Do only MediaCodec specific in PutInput.

None of the call sites use the input thread and wait pipe.

If net_Write() returns a short count, send() is not going to help. It
means the connection was closed.

Allows using tls transport and does
non persistent connection fallback.