Add expat 2.1.0 for Windows, Mac, and for local Linux builds (use system expat otherwise)

lib-src/expat/xmlwf/filemap.h

@@ -0,0 +1,17 @@
+/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
+   See the file COPYING for copying permission.
+*/
+
+#include <stddef.h>
+
+#ifdef XML_UNICODE
+int filemap(const wchar_t *name,
+            void (*processor)(const void *, size_t,
+                              const wchar_t *, void *arg),
+            void *arg);
+#else
+int filemap(const char *name,
+            void (*processor)(const void *, size_t,
+                              const char *, void *arg),
+            void *arg);
+#endif