[Bug 709804] docs: Fix some reference uris

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=709804
  GStreamer | documentation | git

--- Comment #3 from Fabian <derfakir at web.de> 2013-10-10 11:04:09 UTC ---
tried to generate a "git format-patch" style patch.
Hope i got it right.

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