Log Message:
youtube-dl: Update net/youtube-dl to 20180208

Changes:
version 2018.02.08

Extractors
+ [myvi] Extend URL regular expression
+ [myvi:embed] Add support for myvi.tv embeds (#15521)
+ [prosiebensat1] Extend URL regular expression (#15520)
* [pokemon] Relax URL regular expression and extend title extraction (#15518)
+ [gameinformer] Use geo verification headers
* [la7] Fix extraction (#15501, #15502)
* [gameinformer] Fix brightcove id extraction (#15416)
+ [afreecatv] Pass referrer to video info request (#15507)
+ [telebruxelles] Add support for live streams
* [telebruxelles] Relax URL regular expression
* [telebruxelles] Fix extraction (#15504)
* [extractor/common] Respect secure schemes in _extract_wowza_formats

version 2018.02.04

Core
* [downloader/http] Randomize HTTP chunk size
+ [downloader/http] Add ability to pass downloader options via info dict
* [downloader/http] Fix 302 infinite loops by not reusing requests
+ Document http_chunk_size

Extractors
+ [brightcove] Pass embed page URL as referrer (#15486)
+ [youtube] Enforce using chunked HTTP downloading for DASH formats

version 2018.02.03

Core
+ Introduce --http-chunk-size for chunk-based HTTP downloading
+ Add support for IronPython
* [downloader/ism] Fix Python 3.2 support

Extractors
* [redbulltv] Fix extraction (#15481)
* [redtube] Fix metadata extraction (#15472)
* [pladform] Respect platform id and extract HLS formats (#15468)
- [rtlnl] Remove progressive formats (#15459)
* [6play] Do no modify asset URLs with a token (#15248)
* [nationalgeographic] Relax URL regular expression
* [dplay] Relax URL regular expression (#15458)
* [cbsinteractive] Fix data extraction (#15451)
+ [amcnetworks] Add support for sundancetv.com (#9260)