Port the Windows platform backend including Makefile support to SDL3.

This also fixes a long standing bug with the Windows part of the
Makefile linking -lSDL2 into q2ded.exe.

CMakeLists.txt

@@ -725,7 +725,7 @@ set_target_properties(q2ded PROPERTIES
 	RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/release
 	)
 if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-	target_link_libraries(q2ded ${yquake2LinkerFlags} ${yquake2SDLLinkerFlags} ${yquake2ZLibLinkerFlags} ws2_32 winmm)
+	target_link_libraries(q2ded ${yquake2LinkerFlags}
 else()
 	target_link_libraries(q2ded ${yquake2LinkerFlags} ${yquake2ServerLinkerFlags} ${yquake2ZLibLinkerFlags})
 endif()

Makefile

@@ -1152,7 +1152,7 @@ endif
 ifeq ($(YQ2_OSTYPE), Windows)
 release/q2ded.exe : $(SERVER_OBJS) icon
 	@echo "===> LD $@"
-	${Q}$(CC) $(LDFLAGS) build/icon/icon.res $(SERVER_OBJS) $(LDLIBS) $(SDLLDFLAGS) -o $@
+	${Q}$(CC) $(LDFLAGS) build/icon/icon.res $(SERVER_OBJS) $(LDLIBS) -o $@
 	$(Q)strip $@
 else
 release/q2ded : $(SERVER_OBJS)

src/backends/windows/main.c

@@ -26,8 +26,16 @@
  */
 
 #include <windows.h>
+
+#ifndef DEDICATED_ONLY
+#ifdef USE_SDL3
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+#else
 #include <SDL2/SDL.h>
 #include <SDL2/SDL_main.h>
+#endif
+#endif
 
 #include "../../common/header/common.h"