Revert "Remove the remapping of snprintf to _snprintf when compiling with MSC."

This reverts commit 9801635f56.

include/ntconf.h

@@ -146,6 +146,14 @@ extern void NDECL(getlock);
 #define strncmpi(a, b, c) strnicmp(a, b, c)
 #endif
 
+#ifdef _MSC_VER
+/* Visual Studio defines this in their own headers, which we don't use */
+#ifndef snprintf
+#define snprintf _snprintf
+#pragma warning( \
+    disable : 4996) /* deprecation warning suggesting snprintf_s */
+#endif
+#endif
 
 #include <sys/types.h>
 #include <stdlib.h>