Move "ITP" from Wiki into the Dev Ref

[<c.buhtz@posteo.jp>]

Dear Team,

My apologize for contacting you this way. I couldn't find an
appropriate mailing list.

I would like to point you to an wiki related bug ticket in context of
your Developers Reference.

   <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1067939>

Best,
Christian Buhtz