Enable compatibility layer with old descriptor api by default

Signed-off-by: Sebastian Ramacher <sramacher@debian.org>
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

dvbpsi_packet_push does not modify the contents of the packet passed to it in
any way : thus, there is no reason for it not to be const.
external code using this function will not be affected by this change.

(cherry picked from commit 0e76e010506b088dc4a83f84086f34be86d00256)

Enable the API compatibility layer that supports wraps the new API in old API.
Its use is meant only for easing transistion to the new API and will remain exactly
one release. It is scheduled to be removed in version 2.1.

According to EN 300 468, 12 bits after the frequency field are reserved
for future use. Thus, they should be set to 1.

(cherry picked from commit 6e007df2f7eef82243974e3b619fe1c366a1b6a1)
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

(modified by Jean-Paul Saman <jpsaman@videolan.org>)
Added wrapper function to map dvbpsi_ExtendedChannelNameDr onto dvbpsi_DecodeExtendedChannelNameDr and update documentation.

(cherry picked from commit 7841440f06d01e2857fac3db1be07909446bcad4)
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

The generation function for the subtitling descriptor erroneously uses the
modulo operation instead of a bitwise AND.

(cherry picked from commit bc7bb320854b0d4bd4f74a5851be0852681d629d)
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

The index variable in the generation function for the telext descriptor was
scaled by 8 instead of by 5.

(cherry picked from commit 614bfbaebdbfda25f2cb7015e71f997f8874930e)
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Due to scaling the index variable by 8 instead of 4, the generation function of
the parental rating descriptor makes out-of-bounds array accesses.

(cherry picked from commit 0752d56b25f3b2724618de4cd50a11d0f9420af2)
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>