* examples/dvb_print_si.c: Fix a major bug when handling TS with a section begginning in the middle of the payload.

* 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: Fix a segfault when the number of sections changes. * mpeg/psi.h, dvb/si.h: Add functions to validate if there is enough space for a new substructure. * dvb/si.h: Add support for DVB MJD format. * dvb/si.h: Correctly initialize a byte in SDT sub-structure. * dvb/si.h: Fully implement descriptor 0x48 (service descriptor).

* 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.