Streamlink's HLS playlist parser currently ignores RFC 8216 EXT-X-DEFINE tags.

Streamlink's HLS playlist parser currently ignores RFC 8216 EXT-X-DEFINE tags.: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). Add public variable support to the existing playlist-loading surface. An EXT-X-DEFINE with NAME and VALUE binds that name, and an…