I take it to mean that shim6 will not modify the transport layer, but
may have some interaction with the transport layer (aka - transport
layer triggers or indicators).
I think it would be interesting to look at how multi-locator aware
protocols like SCTP and DCCP would operate when there is a shim below,
but I don't think this is on the critical path and should be a separate
document.
I think that this would be premature to consider at this point, but might
be reasonable later on, once we have a good idea of the problem space
- i.e. - leave this type of stuff for rechartering.