[j-nsp] IOS-JUNOS VPLS LDP BGP auto-discovery interop

[Per Granath]

Something about "prefix length size 2" on cisco...

http://forums.juniper.net/t5/Routing/Cisco-and-Juniper-VPLS-Integration-using-BGP/td-p/42308/page/2

Assuming they use the same FEC now.