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_L4/L4DPLMEM.cpp

@@ -0,0 +1,48 @@
+#include "mungal4.h"
+#pragma hdrstop
+
+#include "l4video.h"
+
+extern "C"
+{
+	void *dpl_malloc(int n_bytes);
+	void *dpl_calloc(size_t n, size_t n_bytes);
+	void dpl_free(void *ptr);
+	void dpl_free_all();
+};
+
+void *dpl_malloc(int n_bytes)
+{
+	/*STUBBED: DPL RB 1/20/07
+	Check_Pointer(DPLRenderer::DPLHeap);
+	return DPLRenderer::DPLHeap->Allocate(n_bytes);
+	*/
+	return NULL;
+}
+
+void *dpl_calloc(size_t n, size_t n_bytes)
+{
+	/*STUBBED: DPL RB 1/20/07
+	Check_Pointer(DPLRenderer::DPLHeap);
+	void *p	= DPLRenderer::DPLHeap->Allocate(n * n_bytes);
+	memset(p, 0x0, n_bytes * n);
+	return p;
+	*/
+	return NULL;
+}
+
+void dpl_free(void *ptr)
+{
+	/*STUBBED: DPL RB 1/20/07
+	Check_Pointer(DPLRenderer::DPLHeap);
+	DPLRenderer::DPLHeap->Release(ptr);
+	*/
+}
+
+void dpl_free_all()
+{
+	/*STUBBED: DPL RB 1/20/07
+	Check_Pointer(DPLRenderer::DPLHeap);
+	DPLRenderer::DPLHeap->ReleaseAll();
+	*/
+}