[prosiebensat1] Add support for .ch domain names

[ghost]

see #5786. Please do the same for .ch domains (redirect).

> youtube-dl http://www.sat1.ch/tv/fruehstuecksfernsehen/video/2-der-baumversteher-clip -v
[debug] System config: [u'--restrict-filenames', u'--ignore-errors', u'-n', u'-o', u'%(title)s-%(resolution)s.%(ext)s', u'-f', u'bestvideo[ext!=webm]+bestaudio[ext!=webm]/best[ext!=webm]']
[debug] User config: []
[debug] Command-line args: [u'http://www.sat1.ch/tv/fruehstuecksfernsehen/video/2-der-baumversteher-clip', u'-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2015.11.02
[debug] Python version 2.7.10 - Darwin-15.0.0-x86_64-i386-64bit
[debug] exe versions: avconv 11.4, avprobe 11.4, ffmpeg 2.8.1, ffprobe 2.8.1, rtmpdump 2.4
[debug] Proxy map: {'http': 'http://localhost:8118', 'https': 'http://localhost:8118'}
[generic] 2-der-baumversteher-clip: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 2-der-baumversteher-clip: Downloading webpage
[generic] 2-der-baumversteher-clip: Extracting information
ERROR: Unsupported URL: http://www.sat1.ch/tv/fruehstuecksfernsehen/video/2-der-baumversteher-clip
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 1241, in _real_extract
    doc = compat_etree_fromstring(webpage.encode('utf-8'))
  File "/usr/local/bin/youtube-dl/youtube_dl/compat.py", line 248, in compat_etree_fromstring
    doc = _XML(text, parser=etree.XMLParser(target=etree.TreeBuilder(element_factory=_element_factory)))
  File "/usr/local/bin/youtube-dl/youtube_dl/compat.py", line 237, in _XML
    parser.feed(text)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/etree/ElementTree.py", line 1642, in feed
    self._raiseerror(v)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/etree/ElementTree.py", line 1506, in _raiseerror
    raise err
ParseError: syntax error: line 1, column 0
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 661, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 290, in extract
    return self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 1839, in _real_extract
    raise UnsupportedError(url)
UnsupportedError: Unsupported URL: http://www.sat1.ch/tv/fruehstuecksfernsehen/video/2-der-baumversteher-clip

thanks for such great software