[baidu] Redirect to unsupported wasu.cn

[ghost]

• I've verified and I assure that I'm running youtube-dl 2018.01.14

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• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
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'http://v.baidu.com/comic/1069.htm?frp=bdbrand&q=%E4%B8%AD%E5%8D%8E%E5%B0%8F%E5%BD%93%E5%AE%B6'

[generic] 9409873?refer=video.baidu: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 9409873?refer=video.baidu: Downloading webpage
[generic] 9409873?refer=video.baidu: Extracting information
ERROR: Unsupported URL: https://www.wasu.cn/Play/show/id/9409873?refer=video.baidu.com
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/youtube_dl/YoutubeDL.py", line 784, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/common.py", line 438, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/generic.py", line 3086, in _real_extract
    raise UnsupportedError(url)
youtube_dl.utils.UnsupportedError: Unsupported URL: https://www.wasu.cn/Play/show/id/9409873?refer=video.baidu.com