merge youtube-dl master 22.09.2020

diff --cc youtube_dlc/downloader/hls.py
Simple merge

diff --cc youtube_dlc/downloader/http.py
Simple merge

diff --cc youtube_dlc/extractor/common.py
Simple merge

diff --cc youtube_dlc/extractor/pornhub.py
Simple merge

diff --cc youtube_dlc/extractor/redtube.py
Simple merge

diff --cc youtube_dlc/extractor/telequebec.py
Simple merge

diff --cc youtube_dlc/extractor/twitch.py
Simple merge