* Unified handling of different BMessage formats into MessageAdapter.cpp

* Removed r5_message.cpp and dano_message.cpp accordingly
* Also moved out KMessage handling from Message.cpp to MessageAdapter.cpp
* Fixed some minor style issues in Message.cpp

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21514 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/util/KMessage.h

@@ -16,6 +16,7 @@ class BMessage;
 namespace BPrivate {
 
 class KMessageField;
+class MessageAdapter;
 
 // KMessage
 class KMessage {
@@ -102,6 +103,7 @@ public:
 
 private:
 	friend class KMessageField;
+	friend class MessageAdapter;
 	friend class ::BMessage;		// not so nice, but makes things easier
 
 	struct Header {