[c-nsp] Growing BGP tables

[Randy Bush]

> for each prefix received in update
>    for each more specific prefix in RIB
>      if RIB prefix ge /24 and same next hop as update prefix
>        drop RIB prefix
>    if update prefix ge /24
>      for each less specific prefix in RIB
>        if RIB next hop same as update next hop
>          drop update prefix

some of us won't care if it's the same next hop.  i wish to be
able to choose not to pay for your traffic engineering.

randy