winnt.h should not be self-contained, it must depend on windef.h so
that STRICT works correctly; moved some definitions back to windef.h
where they belong, and removed a couple of definitions that don't
exist on Windows.

diff --git a/server/request.c b/server/request.c
index 66c1b11..ff1450b 100644
--- a/server/request.c
+++ b/server/request.c
@@ -43,7 +43,7 @@
 #include <sys/un.h>
 #include <unistd.h>
 
-#include "winnt.h"
+#include "windef.h"
 #include "winbase.h"
 #include "wincon.h"
 #include "wine/library.h"