dpnet: add missing IDirectPlay8Peer methods

[Michael Stefaniuc]

Luis,

Louis Lenders wrote:
> This is part of bug http://bugs.winehq.org/show_bug.cgi?id=28008
a line length of 400+ chars kinda stretches what is acceptable. Please
try to stick to a length of 100 in dpnet; that's the Wine preferred line
length and also what I used during the COM cleanup in dpnet.

Please also stick with one form of placing the spaces, either
  "TYPE * const var"
or
  "TYPE *const var"
but not both in the same patch. I don't remember which form I have used.

And please try to avoid PVOID and LPVOID, even if MSDN documents the
methods that way. Those are just gratuitous types that add no value.

thanks
bye
	michael