core: call the config hook when options are removed

src/plugins/plugin-api.c

@@ -107,6 +107,16 @@ plugin_api_ngettext (const char *single, const char *plural, int count)
     return NG_(single, plural, count);
 }
 
+/*
+ * Frees an option.
+ */
+
+void
+plugin_api_config_file_option_free (struct t_config_option *option)
+{
+    config_file_option_free (option, 1);
+}
+
 /*
  * Gets pointer on an option.
  */