updates for MSVC 2015's degenerate headers

Note that 'perror' moves from stdio.h to stdlib.h, and 'rename' moves
from stdio.h to io.h. Also, standard C includes move from the compiler
to the Windows SDK, which changes the base path for the include files.

include/compat/dirent_msvc.h

@@ -29,15 +29,24 @@
 
 #include <windows.h>
 
+#if _MSC_VER >= 1900
+#include <../ucrt/stdio.h>
+#include <../ucrt/wchar.h>
+#include <../ucrt/string.h>
+#include <../ucrt/stdlib.h>
+#include <../ucrt/sys/types.h>
+#include <../ucrt/errno.h>
+#else
 #include <../include/stdio.h>
-#include <../include/stdarg.h>
 #include <../include/wchar.h>
 #include <../include/string.h>
 #include <../include/stdlib.h>
-#include <../include/malloc.h>
 #include <../include/sys/types.h>
-#include <sys/stat.h>
 #include <../include/errno.h>
+#endif
+
+#include <stdarg.h>
+#include <sys/stat.h>
 
 /* Indicates that d_type field is available in dirent structure */
 #define _DIRENT_HAVE_D_TYPE

include/compat/stdio.h

@@ -7,7 +7,13 @@
 #define LIBCRYPTOCOMPAT_STDIO_H
 
 #ifdef _MSC_VER
+#if _MSC_VER >= 1900
+#include <../ucrt/stdlib.h>
+#include <../ucrt/corecrt_io.h>
+#include <../ucrt/stdio.h>
+#else
 #include <../include/stdio.h>
+#endif
 #else
 #include_next <stdio.h>
 #endif

include/compat/stdlib.h

@@ -4,7 +4,11 @@
  */
 
 #ifdef _MSC_VER
+#if _MSC_VER >= 1900
+#include <../ucrt/stdlib.h>
+#else
 #include <../include/stdlib.h>
+#endif
 #else
 #include_next <stdlib.h>
 #endif

include/compat/string.h

@@ -7,7 +7,11 @@
 #define LIBCRYPTOCOMPAT_STRING_H
 
 #ifdef _MSC_VER
+#if _MSC_VER >= 1900
+#include <../ucrt/string.h>
+#else
 #include <../include/string.h>
+#endif
 #else
 #include_next <string.h>
 #endif

include/compat/sys/stat.h

@@ -11,7 +11,11 @@
 #else
 
 #include <windows.h>
+#if _MSC_VER >= 1900
+#include <../ucrt/sys/stat.h>
+#else
 #include <../include/sys/stat.h>
+#endif
 
 /* File type and permission flags for stat() */
 #if !defined(S_IFMT)

include/compat/sys/types.h

@@ -4,7 +4,11 @@
  */
 
 #ifdef _MSC_VER
+#if _MSC_VER >= 1900
+#include <../ucrt/sys/types.h>
+#else
 #include <../include/sys/types.h>
+#endif
 #else
 #include_next <sys/types.h>
 #endif

include/compat/time.h

@@ -4,7 +4,11 @@
  */
 
 #ifdef _MSC_VER
+#if _MSC_VER >= 1900
+#include <../ucrt/time.h>
+#else
 #include <../include/time.h>
+#endif
 #define gmtime_r(tp, tm) ((gmtime_s((tm), (tp)) == 0) ? (tm) : NULL)
 #else
 #include_next <time.h>

libtls-standalone/include/string.h

@@ -7,7 +7,11 @@
 #define LIBCRYPTOCOMPAT_STRING_H
 
 #ifdef _MSC_VER
+#if _MSC_VER >= 1900
+#include <../ucrt/string.h>
+#else
 #include <../include/string.h>
+#endif
 #else
 #include_next <string.h>
 #endif