clarified status of zstdmt_compress.h API
diff --git a/lib/compress/zstdmt_compress.h b/lib/compress/zstdmt_compress.h
index fad63b6..a6e1759 100644
--- a/lib/compress/zstdmt_compress.h
+++ b/lib/compress/zstdmt_compress.h
@@ -15,10 +15,11 @@
#endif
-/* Note : All prototypes defined in this file are labelled experimental.
- * No guarantee of API continuity is provided on any of them.
- * In fact, the expectation is that these prototypes will be replaced
- * by ZSTD_compress_generic() API in the near future */
+/* Note : This is an internal API.
+ * Some methods are still exposed (ZSTDLIB_API), because for some time,
+ * it used to be the only way to invoke MT compression.
+ * Now, it's recommended to use ZSTD_compress_generic() instead.
+ * These methods will stop being exposed in a future version */
/* === Dependencies === */
#include <stddef.h> /* size_t */
