bug#47243: pr lacks -p

[Paul Eggert]

On 3/18/21 8:38 AM, Eric Blake wrote:
> POSIX requires 'pr -p' to support paging (although it incorrectly stated
> that it waits for \r, and is being fixed to wait for \n instead):
> https://austingroupbugs.net/view.php?id=1433
>
> During discussion of the behavior of -p today, the Austin Group was
> surprised that coreutils' pr lacks -p altogether.

Given that hardly anybody uses pr any more, I'm surprised that the 
Austin Group still cares about its options. It's an obsolete utility, 
and ought to be deprecated.