Parental advisory: explicit kludge.

This reverts commit c46366ce.

HTTP Live Streams are number from 0 in vlc_array_t. The condition in Download()
excluded 0 as valid stream. The first element in the array is at index 0, so consider
this to be valid.
(cherry picked from commit 7acbd2448c289cf28a80cfc0dd2ece21860aa6e9)

If block_Realloc() fails in the function AccessDownload() then resolving
segment->data->i_buffer results in a segmentation error. Instead of continuing
when block_Realloc() has failed, just cleanup and leave the function.

This reverts commit 0861691f.

This should not be possible, probably the backtraces were corrupted.

This is extra-precaution, but it cannot do harm

VLC doesn't use foreign M4 macros anymore

This reverts commit ae14df5a.

[d85d6537] explains why it is needed

This introduce a circular dependency. The correct way (which what Rafael is doing) is to explicitely set the dependencies in the .package to automake, libtool...

This fix unbreaks those who don't build autoconf.

Note, I have absolutely no idea why this is needed. This doesn't feel right anyhow.

It could happen when the demuxer was forced.

It was called 2 times.

Payload types are scoped to the RTP session, and we put each ES in its
own session, so no risk of conflict

It is described on http://shinnai.altervista.org/exploits/SH-008-20101026.html
Thanks to geal for helping finding the problem
(cherry picked from commit b531955c)
Signed-off-by: Rafaël Carré <rafael.carre@gmail.com>

IV attribute of tag #EXT-X-KEY was parsed for any version of the protocol.
However chapter "7. Protocol version compatibility" lists the IV tag being
protocol version 2 or higher. This patch restricts the IV attribute to version
2 or higher of the protocol.
(cherry picked from commit a07189f8)