Changes to dvbreader to parse required region 0x82.
Support to process multiple regions for a single provider (required for Movistar+). This is achieved with a new special descriptor_tag 0xFF. Duplicates are managed by defining a processing priority per region. For Movistar, 0x83 takes priority over 0x82.
This pull request overrides #277 and fixes missing channels reported here: https://github.com/oe-alliance/AutoBouquetsMaker/issues/276#issuecomment-1724630961