libyang MAINTENANCE headers includes cleanup
iwyu_tool.py used
diff --git a/src/plugins.c b/src/plugins.c
index bb59839..762ad42 100644
--- a/src/plugins.c
+++ b/src/plugins.c
@@ -24,13 +24,16 @@
#include <limits.h>
#include <pthread.h>
#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
-#include <sys/types.h>
#include "config.h"
#include "common.h"
#include "plugins_exts.h"
#include "plugins_types.h"
+#include "set.h"
/*
* internal type plugins records