dccp: Change maintainer

Today was as good as any other day, but I felt I had to do things I love
to when paying hommage to somebody I love, so please apply this one,
something he would be proud of, even if so geekly.

    Way past it was/is deserved.

    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: David S. Miller <davem@davemloft.net>