A safer File.readln

[Andrei Alexandrescu via Digitalmars-d]

On 1/22/17 8:52 PM, Chris Wright wrote:
> The /dev/zero version at least could be solved by calling stat on the file
> and limiting reads to the reported size.

I recall reported size for special files is zero. We special case 
std.file.read for those. -- Andrei