[Users] caller number removal

[Bogdan-Andrei Iancu]

Hi,

I updated the docs to include the description of the function.

Thanks for report,
bogdan

Klaus Darilion wrote:

> No, it works in all versions of (open)ser. It was only forgotten to 
> document it.
>
> regards
> klaus
>
> unplug wrote:
>
>> How about the setting in version 1.0.0?  As found that remove_hf
>> function is only available in devel version.
>>
>> unplug
>>
>> For the remove_hf
>