youtube-dl 2018.12.03

Core

• [utils] Fix random_birthday to generate existing dates only (#18284)

Extractors

• [tiktok] Add support for tiktok.com (#18108, #18135)

• [pornhub] Use actual URL host for requests (#18359)
• [lynda] Fix authentication (#18158, #18217)
• [gfycat] Update API endpoint (#18333, #18343)

• [hotstar] Add support for alternative app state layout (#18320)

• [azmedien] Fix extraction (#18334, #18336)

• [vimeo] Add support for VHX (Vimeo OTT) (#14835)

• [joj] Fix extraction (#18280, #18281)

• [wistia] Add support for fast.wistia.com (#18287)