The function dvbpsi_CheckPSISection() correctly checked the TOT table, but
not the TDT table. This patch corrects this ommission.

examples/dvbinfo/udp.c: Some OS-es do not support SOL_IP and SOL_IPV6, so provide alternatives for them.

Use explicite parenthesis around ? : constructions.

- add boundary checking
- add doxygen comment
- fix some typos.
- fix L1L2MERGE macro

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

The API in version 1.0.0 has changed and the macros dvbpsi_New*/dvbpsi_Delete* have been
deprecated (and removed).