This patch removes a bunch of superfluous #include directives: if

postgres.h or c.h includes a system header (such as stdio.h or
stdlib.h), there's no need to specifically include it in any of the .c
files in the backend.

Neil Conway

src/backend/port/dynloader/netbsd.c

@@ -42,9 +42,6 @@ static char sccsid[] = "@(#)dl.c	5.4 (Berkeley) 2/23/91";
 #include <link.h>
 #include <dlfcn.h>
 
-#include <stdio.h>
-#include <stdlib.h>
-
 #include "dynloader.h"
 
 static char error_message[BUFSIZ];