Update dynamic DNS entries

Current versions:
3.8.3 HEAD

Homepage: https://sourceforge.net/p/ddclient/wiki/Home

Formula history

Mike McQuaid Use hash rockets again. (#5177)
Mike McQuaid Use Ruby 1.9+ symbol hash keys in all formulae. (#4942)
Viktor Szakats ddclient: use secure homepage
Xu Cheng ddclient: bottle unneeded
Alex Dunn ddclient 3.8.3
Nikolaus Wittenstein Add descriptions to all remaining homebrew packages
Saul Shanabrook ddclient: add HEAD
Jack Nagel Use doc helper where appropriate
Albert Volkman ddclient: update homepage
Adam Vandenberg use opt shortcuts
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