Reflect comments

Signed-off-by: Tomoaki Kobayashi <[email protected]>

Author: moatom

lib/fluent/plugin/in_tail.rb

@@ -215,7 +215,7 @@ def configure(conf)
 
     def check_dir_permission
       expand_paths_raw.select { |path|
-        if !File.readable?(path)
+        if !File.exist?(path)
           inaccessible_dir = Pathname.new(File.expand_path(path))
             .ascend
             .reverse_each