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Replace WTFPL with MIT license.
Acked-By: Christophe Massiot <massiot@via.ecp.fr>
Acked-By: Georgi Chorbadzhiyski <gf@unixsol.org>
Acked-By: Jean-Paul Saman <jpsaman@videolan.org>
Acked-By: Rémi Duraffort <ivoire@videolan.org>

This is to avoid the hack with the CAT table, which doesn't have a descs
"header". So there are new functions descl_* to handle descriptor lists
without length. This change is backwards compatible for all tables except
CAT.

* mpeg/psi_print.h: Move DVB-specific functions to dvb/si_print.h. * examples/dvb_print_si.c: Fix a number of end-of-lines.

* mpeg/psi.h, dvb/si.h: Add descXX_validate() functions. * mpeg/psi_print.h: Validate descriptors before accessing them. * mpeg/psi.h: Avoid duplicate copies of the CRC32 table. * ALL: Make sure we return booleans. * dvb/si.h: Add support for DVB character sets. * dvb/si.h: Add content delivery descriptors 0x43, 0x44 and 0x5a. * dvb/si.h: Add VBI teletext descriptor 0x46. * examples/dvb_print_si.c: Add support for charset conversion via iconv.

* mpeg/psi.h: Fix a bug with descriptor 0x05. * mpeg/psi.h, dvb/si.h: Cosmetic changes in print functions. * examples/dvb_print_si.c: New example file to print DVB tables in a TS stream.

* ALL: New *_print() set of functions. * ALL (tables): Check CRC only when needed; also check tables coherence. * ALL (descriptors): Add a lot of missing _get_ functions. * ALL (descriptors): Fix off-by-one overflow of structure array. * mpeg/psi.h: Fix off-by-one overflow of PAT program array.