wip-addr: identify transport_type as same numberspace as entity_addr_t::type_tt

Signed-off-by: Marcus Watts <mdw@cohortfs.com>
mpc: dump/parse/print transport types

Signed-off-by: Marcus Watts <mdw@cohortfs.com>
Started work on integrating into monmap.
Discovered I needed some primitives to make it work.
DOES NOT BUILD AS IS - NEEDS MORE FIXING.

Signed-off-by: Marcus Watts <mdw@cohortfs.com>