Log Message:
multimedia/streamlink: update to streamlink-2.3.0

Changelog:

== streamlink 2.3.0 (2021-07-26)

Release highlights:

- Implemented: new plugin URL matching API [#3814], [#3821]
  Third-party plugins which use the old API will still be resolved,
  but those plugins will have to upgrade in the future. See the
  documentation's deprecations page for more information.
- Implemented: HLS media initialization section (fragmented
  MPEG-4 streams) [#3828]
- Upgraded: `requests` to `>=2.26.0,<3` and set it to `==2.25.1`
  on Windows [#3864], [#3880]
- Fixed: YouTube channel URLs, premiering live streams, added API
  fallback [#3847], [#3873], [#3809]
- Removed plugins: canalplus [#3841], dommune [#3818], liveedu [#3845],
  periscope [#3813], powerapp [#3816], rtlxl [#3842],
  streamingvideoprovider [#3843], teleclubzoom [#3817], tigerdile [#3819]

Hakkin Lain (1):
      stream.hls: set fallback playlist reload time to 6 seconds (#3887)

back-to (16):
      plugins.youtube: added API fallback
      plugins.rtvs: fixed livestream
      plugins.nos: Fixed Livestream and VOD
      plugins.vlive: fixed livestream (#3820)
      plugins.Tigerdile: removed
      plugins.Dommune: removed
      plugins.PowerApp: removed
      plugins.TeleclubZoom: removed (#3817)
      plugins.cdnbg: Fix regex and referer issues
      plugins.rtlxl: removed
      plugins.CanalPlus: removed
      plugins.liveedu: removed
      plugins.Streamingvideoprovider: removed
      plugin.api: update useragents
      plugins.youtube: detect Livestreams with 'isLive'
      plugins.nimotv: use 'mStreamPkg'

bastimeyer (30):
      plugins.youtube: translate embed_live URLs
      plugins.periscope: remove plugin
      plugins.mediaklikk: rewrite plugin
      stream.hls: add type hints and refactor
      stream.hls: implement media initialization section
      plugin: new matchers API
      plugins: update protocol plugins
      plugins: update basic plugins
      plugins: update plugins with URL capture groups
      plugins: update plugins with spec. can_handle_url
      plugins: update plugins with multiple URL matchers
      plugins: update plugins with URL translations
      session: resolve deprecated plugins
      plugins.zdf_mediathek: refactor plugin, drop HDS
      docs: add deprecations page
      plugins.tv8: remove API, find HLS via simple regex
      plugins.youtube: find videoId on channel pages
      chore: replace issue templates with forms
      chore: fix issue forms checklist
      tests: remove mock from dev dependencies
      vendor: set requests to >=2.26.0,<3
      tests: temporarily skip broken tests on win32
      tests: fix unnecessary hostname lookup in cli_main
      docs: fix headline anchors on deprecations page
      vendor: downgrade requests to 2.25.1 on Windows
      tests: refactor TestMixinStreamHLS
      streams.segmented: refactor worker and writer
      streams.segmented: refactor reader
      streams.hls: refactor worker
      streams.hls: fix playlist_reload_time

gustaf (1):
      plugins.tv4play: fix plugin URL regex

vinyl-umbrella (1):
      plugins.openrectv: update HLS URLs (#3850)