bug#33281: head does not consume input after '-c' is satisfied

[Paul Eggert]

On 11/5/18 1:17 PM, Philip Rowlands wrote:
> To achieve consistency in the other direction, head could ignore the 
> optimization to reduce the number of bytes read, and always read 8192 bytes, 
> knowing that some would be discarded.

Let's not do that. It's less efficient and less useful than what GNU 
'head -c4' is doing now.

> For widely differing values, the only way to produce the same residual output 
> would be to consume all input data.

Eeuuww. Let's *especially* not do that.