add config options for testing the Origin header in cors requests

- allow_all_cors_origins - whether or not to allow all origins
- allowed_cors_origins - a list of allowed origins (used if allow_all_cors_origins is false)

winixd/core/request.h

@@ -595,6 +595,7 @@ private:
 	int SelectDeflateVersion();
 	void SelectCompression(size_t source_len, bool & compression_allowed, int & compression_encoding);
 	void PrepareSessionCookie();
+	void CheckOriginHeader();
 	void PrepareHeaders(bool compressing, int compress_encoding, size_t output_size);
 	void ModifyStatusForRedirect();
 	void PrepareSendFileHeaderForStaticMountpoint();