Bug#718816: moreutils: split parallel binary in extra package

[Mert Dirik <mertdirik@gmail.com>]

Hi Nicolas,

Thanks for adopting moreutils.

Now that moreutils has a new maintainer, do you consider dealing with 
this issue? It would be very helpful for people who want to install both 
parallel and moreutils together.

Another option would be renaming the parallel binary and using 
alternatives for both packages.

CC'ing parallel maintainer and the related bug in parallel package.