move roff papers from src to doc repository

[Gabor Kovesdan]

Em 18-05-2013 06:23, Ulrich Spörlein escreveu:
> So, to get groff out of source we need to first remove the roff
> docs/papers as we will no longer build and install them. As they still
> contain conceivably useful information, I want to move them into the doc
> repository.
I don't object to this but I'd like to see them better integrated. In 
your patch, I see they use bsd.doc.mk, which is not in the doc 
repository. I'd prefer having the Makefile code for these extracted into 
a doc.groff.mk or whatever and integrated into the doc build. The 
overall stuff should fit the existing conventions.

Gabor