bug#35418: [PATCH] Don't poll auto-revert files that use notification

[Zhang Haijun]

It seems that file watching of kqueue is useless for me. The directory watching 
satisfies almost all of my needs. So I will continue to use my modified version.

> 在 2019年5月2日，下午8:30，Michael Albinus <michael.albinus@gmx.de> 写道：
> 
> Zhang Haijun <ccsmile2008@outlook.com> writes:
> 
>> If both file watching and directory watching are used for one file, it
>> will works for all use cases.
> 
> This doesn't fit into filenotify.el. Which watch descriptor do you
> expect from `file-notify-add-watch'?
> 
> Best regards, Michael.