change MAINTENANCE move plugins sources into separate subdirectories
diff --git a/src/tree_data.c b/src/tree_data.c
index c02dfcb..5ae3bc8 100644
--- a/src/tree_data.c
+++ b/src/tree_data.c
@@ -38,7 +38,7 @@
 #include "parser_internal.h"
 #include "path.h"
 #include "plugins.h"
-#include "plugins_exts_metadata.h"
+#include "plugins_exts/metadata.h"
 #include "plugins_internal.h"
 #include "plugins_types.h"
 #include "set.h"