RELEASE-NOTES: add contributors not mentioned

RELEASE-NOTES

@@ -47,6 +47,7 @@ advice from friends like these:
  Rainer Canavan, Paul Howarth, Jerome Vouillon, Ruslan Gazizov, Yang Tse,
  Kamil Dudka, Alex Bligh, Ben Greear, Hoi-Ho Chan, Howard Chu, Dirk Manske,
  Pavel Raiskup, John-Mark Bell, Eric Mertens, Tor Arntsen, Douglas Kilpatrick,
- Igor Novoseltsev, Jason McDonald
+ Igor Novoseltsev, Jason McDonald, Dan Fandrich, Tanguy Fautre, Guenter Knauf,
+ Julien Chaffraix, Kalle Vahlman
 
         Thanks! (and sorry if I forgot to mention someone)