youtube-dl: Update net/youtube-dl to 20160618

Changes:
version 2018.06.18

Core
* [downloader/rtmp] Fix downloading in verbose mode (#16736)

Extractors
+ [markiza] Add support for markiza.sk (#16750)
* [wat] Try all supported adaptive URLs
+ [6play] Add support for rtlplay.be and extract hd usp formats
+ [rtbf] Add support for audio and live streams (#9638, #11923)
+ [rtbf] Extract HLS, DASH and all HTTP formats
+ [rtbf] Extract subtitles
+ [rtbf] Fixup specific HTTP URLs (#16101)
+ [expressen] Add support for expressen.se
* [vidzi] Fix extraction (#16678)
* [pbs] Improve extraction (#16623, #16684)
* [bilibili] Restrict cid regular expression (#16638, #16734)

version 2018.06.14

Core
* [downloader/http] Fix retry on error when streaming to stdout (#16699)

Extractors
+ [discoverynetworks] Add support for disco-api videos (#16724)
+ [dailymotion] Add support for password protected videos (#9789)
+ [abc:iview] Add support for livestreams (#12354)
* [abc:iview] Fix extraction (#16704)
+ [crackle] Add support for sonycrackle.com (#16698)
+ [tvnet] Add support for tvnet.gov.vn (#15462)
* [nrk] Update API hosts and try all previously known ones (#16690)
* [wimp] Fix Youtube embeds extraction

version 2018.06.11

Extractors
* [npo] Extend URL regular expression and add support for npostart.nl (#16682)
+ [inc] Add support for another embed schema (#16666)
* [tv4] Fix format extraction (#16650)
+ [nexx] Add support for free cdn (#16538)
+ [pbs] Add another cove id pattern (#15373)
+ [rbmaradio] Add support for 192k format (#16631)

(leot)