fix for RtConfig Cisco address-family syntax

[Shane Kerr]

spz,

On Mon, 2008-08-04 at 00:45 +0200, S.P.Zeidler wrote:
> there's two problems with the Cisco BGP config RtConfig produces at
> present, which Daryl Collins <daryl at internode.com.au> brought to my
> attention:

I think the patch is probably not "the object-oriented way", but it
looks Good Enough for the IRRToolSet, so I have merged it as it is:

http://irrtoolset.isc.org/ticket/5

--
Shane