Log Message:
Update net/youtube-dl to 20151124.

Changes:
2015.11.24
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o Misc bug fixes and improvements

2015.11.23
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o Misc bug fixes and improvements (most user visible change are fixes for
youtube extractor)

2015.11.21
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o Misc bug fixes and improvements

2015.11.19
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o Misc bug fixes and improvements

2015.11.18
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o Add extractor for dplay
o Misc bug fixes and improvements

2015.11.15
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o Misc bug fixes and improvements

2015.11.13
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o Add extractor for vidto
o Misc bug fixes and improvements