Bunch More Work, mostly cleanup and organization.

Wanted to do this now before it gets out of hand.

Ideally, this can be used for a Winelib-like option eventually, too, where you
don't load OS/2 binaries at all but rather compile and link your OS/2-based
source code against this API reimplementation.

native/msg.c

@@ -1,12 +1,13 @@
-#include "native.h"
+#include <unistd.h>
+
+#include "os2native.h"
+#include "msg.h"
 
 NATIVE_MODULE(msg);
 
-static uint32 DosPutMessage(uint32 handle, uint32 msglen, const char *msg)
+APIRET DosPutMessage(HFILE handle, ULONG msglen, PCHAR msg)
 {
-    // !!! FIXME: this isn't right, but good enough for now.
-    fwrite(msg, msglen, 1, stdout);
-    fflush(stdout);
+    write(handle, msg, msglen);
     return 0;
 } // DosPutMessage