Time to move logger from experimental to std ?

[Basile B.]

On Friday, 1 December 2017 at 15:51:42 UTC, Claude wrote:
> On Thursday, 30 November 2017 at 09:39:20 UTC, Basile B. wrote:
>> On Wednesday, 29 November 2017 at 21:14:57 UTC, Claude wrote:
>>> On Wednesday, 29 November 2017 at 14:32:54 UTC, Basile B. 
>>> wrote:
>>> Did I miss anything?
>>
>> Sorry but yes, i think so, the handle is indirectly accessible 
>> with "FileLogger.file.fileno".
>
> Oops! Sorry for the noise...

Now on ~master, the filename and the File are even protected.