[njpwworld] Referer needed for login

[namX1337]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.03.10. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2018.03.10

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• Searched the bugtracker for similar issues including closed ones
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• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add the -v flag to your command line you run youtube-dl with (youtube-dl -v <your command line>), copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'https://njpwworld.com/p/s_series_00472_1_bs', u'-o', u'test.ts', u'-u', u'PRIVATE', u'-p', u'PRIVATE', u'--hls-use-mpegts', u'--restrict-filenames', u'-v']
[debug] Encodings: locale ANSI_X3.4-1968, fs ANSI_X3.4-1968, out ANSI_X3.4-1968, pref ANSI_X3.4-1968
[debug] youtube-dl version 2018.03.10
[debug] Python version 2.7.14+ (CPython) - Linux-4.14.0-3-amd64-x86_64-with-debian-buster-sid
[debug] exe versions: ffmpeg 3.4.2, ffprobe 3.4.2
[debug] Proxy map: {}
[NJPWWorld] Logging in
ERROR: Unable to login: HTTP Error 403: Forbidden (caused by HTTPError()); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 519, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2199, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/lib/python2.7/urllib2.py", line 435, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 548, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 473, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 407, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 556, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

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Description of your issue, suggested solution and other information

The authentication method for njpwworld.com has changed a couple of days ago. Authentication with the URL https://njpwworld.com/auth/login now requires the referer https://njpwworld.com/auth to work. If the referer is not provided the request returns 403.

Running youtube-dl with the option --referer https://njpwworld.com/auth is a workaround, but I'd appreciate if the extractor would use this referer implicitly.