At the moment the client just iterates to find the highest version - however unsupported versions should have been dropped from the list (so should banned versions)

This means when we add version 0x02 existing clients break.

Need to find a way to add the versions without breaking the existing clients. One option may be to add version 0x00 existing clients will not use this as 0x01 is higher - if a client selects 0x00 then begin negotiating the version again.