Initial import of Red Planet v4.10 Win32 source

Imports the current Win32 source for the pod-racing game 'Red Planet',
built on the MUNGA engine and its L4 (Win32/DirectX) platform layer:

- MUNGA / MUNGA_L4: cross-platform engine core and Win32 backend
- RP / RP_L4: Red Planet game logic and Win32 application
- DivLoader, Setup1: asset loader and installer project
- lib, MUNGA_L4/openal, MUNGA_L4/sos: third-party audio dependencies

Removed stale Subversion metadata and added .gitignore/.gitattributes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

MUNGA/SFESKT.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include "socket.h"
+
+class SafeIterator;
+
+typedef int IteratorMemo;
+
+enum
+{
+	PlugAdded = 0,
+	PlugRemoved,
+	NextSafeSocketMemo
+};
+
+class SafeSocket : public Socket
+{
+	friend class SafeIterator;
+
+public:
+	~SafeSocket();
+	Logical TestInstance() const;
+
+protected:
+	SafeSocket(Node *node);
+
+	void SendIteratorMemo(IteratorMemo memo, void *content);
+
+private:
+	SafeIterator *iteratorHead;
+};
+
+class SafeIterator : public SocketIterator
+{
+	friend class SafeSocket;
+
+public:
+	~SafeIterator();
+	Logical TestInstance() const;
+
+protected:
+	SafeIterator(SafeSocket *safeSocket);
+
+private:
+	virtual void ReceiveMemo(IteratorMemo memo, void *content);
+
+	SafeIterator *nextIterator;
+	SafeIterator *prevIterator;
+};