[RFA] Allow to enable run/stop notifications for function calls.

[Eli Zaretskii]

> From: Vladimir Prus <vladimir@codesourcery.com>
> Date: Thu, 1 May 2008 17:51:48 +0400
> 
> 
> This patch allows a frontend to request the notification for function
> calls to be still emitted, by using
> 
>   -enable-feature infcall-run-stop-notifications
> 
> OK?

Should we document it?