[c-nsp] 15.1SY & draft-rosen MVPN

[Phil Mayers]

It's late and I'm tired, so maybe I'm missing something, but after a 
reload into 15.1SY, our testing sup270 failed to take the "mdt" commands 
under VRFs:

  mdt default 239.254.1.2
   ^
% Invalid input detected at '^' marker.

The VRFs are all "new" format "vrf definition" if that matters, but an 
old-style "ip vrf" object doesn't take the command either.

There's a bunch of stuff in the config guide about mLDP-based MVPNs and 
some new "l3vpn encap" command stuff:

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/15.1SY/config_guide/sup720/ipv4_multicast_vpn.html

Any ideas anyone? Bug?

Cheers,
Phil