- when connecting to a mgm server as a transporter, create a NdbMgmHandle
- over this mgm handle, report the dynamic ports
- then turn it into a transporter
- this will re-report dynamic ports to mgmds when they restart (as we'll have to
set up our transporter again). This will also report it to all mgmds (as we'll
have transporters to all of them).
Treat the management server specially.
It should always be the server in a transporter as we then have a known
port to connect to on node restart.
allows a mgm connection (i.e. to the management server port, our known port)
to be transformed into a transporter connection.
Also, clean up the struct TransporterConfiguration (used to be a struct for
each transporter type. now there's just one)
