[babel] Notes on 6126bis

[Matthieu Boutier <[e-mail]>]

The current 6126bis draft is sometimes using (prefix, plen)
and sometimes (prefix).  I think that this is an implementation
detail: prefixes obviously have a length.  Patch attached.

The draft has inconsistent index ordering.  Patch attached.

The draft use sometimes "route table", and sometimes "routing
table".  A choice should be made.

Missing IANA considerations.  From earlier email:

 0 --       special format (Pad1);
 1-111 --   non-mandatory, specification required;
 112-126 -- non-mandatory, local and experimental use;
 127 --     reserved for expansion of the non-mandatory space;
 128-239 -- mandatory, specification required;
 240-254 -- mandatory, local and experimental use;
 255 --     reserved for expansion of the mandatory space.

Matthieu