ports/59599: Update add conflicts to the samba-* ports

[Mark Linimon]

> David Chapman is taking time off from FreeBSD.  I would be willing to
> commit this if it's approved by him and portmgr.

While it's eminently fair for anyone to take time off FreeBSD
(this is, after all, a volunteer project!), it's somewhat awkward
to have someone who is doing so, maintaining a high-profile port
like this one.  There are a number of PRs filed against it.

Having said that, David has been polite and prompt in replying
to my own emails (about the PRs' states -- implying that several
of them are older and should just be closed, but I myself don't
know enough about samba to know what's what and thus close them
myself).

But perhaps I could suggest that David might want to hand this
port one off to someone who is more actively developing, using
samba on FreeBSD, right now?

This is not meant as anything personal, it's more out of concern
for those PRs (which one of my ports monitoring reports consistently
highlights :-) )

mcl