patch(1) depends on RCS - should it?

[Benjamin Kaduk]

I guess I'm late to the party (catching up on the whole thread took a 
while...)

On Mon, 7 Oct 2013, Eitan Adler wrote:

> patch(1) explicitly tries to use RCS (and SCCS) in certain cases.  Are
> we okay with a base system utility that behaves differently depending
> on whether a port is installed? Should the relevant code be removed
> from patch(1)?
>
> See head/usr.bin/patch/inp.c lines 166 to 240 for details.

It seems like maybe this question should have been answered before rcs was 
removed, instead of after?
(I don't know whether I would have expected you to be able to find every 
use of rcs, everywhere, prior to removing it, but this is what public 
declaration of intent/discussions help with.)

-Ben