Merge remote-tracking branch 'public/pr/1828' into mbedtls-2.1

ChangeLog

@@ -11,6 +11,8 @@ Bugfix
      return value. Found by @davidwu2000. #839
    * Fix the key_app_writer example which was writing a leading zero byte which
      was creating an invalid ASN.1 tag. Found by Aryeh R. Fixes #1257
+   * Remove unused headers included in x509.c. Found by Chris Hanson and fixed
+     by Brendan Shanks. Part of a fix for #992.
 
 Changes
    * Change the shebang line in Perl scripts to look up perl in the PATH.

library/x509.c

@@ -65,15 +65,6 @@
 #include <time.h>
 #endif
 
-#if defined(MBEDTLS_FS_IO)
-#include <stdio.h>
-#if !defined(_WIN32)
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <dirent.h>
-#endif
-#endif
-
 #define CHECK(code) if( ( ret = code ) != 0 ){ return( ret ); }
 #define CHECK_RANGE(min, max, val) if( val < min || val > max ){ return( ret ); }