Log Message:
youtube-dl: Update to 20201126

pkgsrc changes:
 - Remove patch-youtube__dl_extractor_rai.py: applied upstream

Changes:
20201126
--------
Core
* [downloader/fragment] Set final file's mtime according to last fragment's
  Last-Modified header (#11718, #18384, #27138)

Extractors
+ [spreaker] Add support for spreaker.com (#13480, #13877)
* [vlive] Improve extraction for geo-restricted videos
+ [vlive] Add support for post URLs (#27122, #27123)
* [viki] Fix video API request (#27184)
* [bbc] Fix BBC Three clip extraction
* [bbc] Fix BBC News videos extraction
+ [medaltv] Add support for medal.tv (#27149)
* [youtube] Imporve music metadata and license extraction (#26013)
* [nrk] Fix extraction
* [cda] Fix extraction (#17803, #24458, #24518, #26381)

20201124
--------
Core
+ [extractor/common] Add generic support for akamai HTTP format extraction

Extractors
* [youtube:tab] Fix feeds extraction (#25695, #26452)
* [youtube:favorites] Restore extractor
* [youtube:tab] Fix some weird typo (#27157)
+ [pinterest] Add support for large collections (more than 25 pins)
+ [franceinter] Extract thumbnail (#27153)
+ [box] Add support for box.com (#5949)
+ [nytimes] Add support for cooking.nytimes.com (#27112, #27143)
* [lbry] Relax URL regular expression (#27144)
+ [rumble] Add support for embed pages (#10785)
+ [skyit] Add support for multiple Sky Italia websites (#26629)
+ [pinterest] Add support for pinterest.com (#25747)

202011211
---------
Core
* [downloader/http] Fix crash during urlopen caused by missing reason
  of URLError
* [YoutubeDL] Fix --ignore-errors for playlists with generator-based entries
  of url_transparent (#27064)

Extractors
+ [svtplay] Add support for svt.se/barnkanalen (#24817)
+ [svt] Extract timestamp (#27130)
* [svtplay] Improve thumbnail extraction (#27130)
* [youtube] Fix error reason extraction (#27081)
* [youtube] Fix like and dislike count extraction (#25977)
+ [youtube:tab] Add support for current video and fix lives extraction (#27126)
* [infoq] Fix format extraction (#25984)
* [francetv] Update to fix thumbnail URL issue (#27120)
* [youtube] Improve yt initial data extraction (#27093)
+ [discoverynetworks] Add support new TLC/DMAX URLs (#27100)
* [rai] Fix protocol relative relinker URLs (#22766)
* [rai] Fix unavailable video format detection
* [rai] Improve extraction
* [rai] Fix extraction (#27077)
* [viki] Improve format extraction
* [viki] Fix stream extraction from MPD (#27092)
* [googledrive] Fix format extraction (#26979)
+ [amara] Add support for amara.org (#20618)
* [vimeo:album] Fix extraction (#27079)
* [mtv] Fix mgid extraction (#26841)

20201119
--------
Core
* [extractor/common] Output error for invalid URLs in _is_valid_url (#21400,
  #24151, #25617, #25618, #25586, #26068, #27072)

Extractors
* [youporn] Fix upload date extraction
* [youporn] Make comment count optional (#26986)
* [arte] Rework extractors
    * Reimplement embed and playlist extractors to delegate to the single
      entrypoint artetv extractor
    * Improve embeds detection (#27057)
+ [arte] Extract m3u8 formats (#27061)
* [mgtv] Fix format extraction (#26415)
+ [lbry] Add support for odysee.com (#26806)
* [francetv] Improve info extraction
+ [francetv] Add fallback video URL extraction (#27047)