[c-nsp] IOS: catch 22 when enabling new bgp neighbors

[sthaug at nethelp.no]

> [neighbor 192.0.2.100 remote-as 64511 shutdown]
> 
> >Wow, you can do that? I feel really really dumb now...
> 
> so do I ;-)

So maybe this feature needs better documentation?

Steinar Haug, Nethelp consulting, sthaug at nethelp.no