Mutation Changes on Serialization

[whwalter]

Gateway bytes change when serializing default settings even if the settings of the received object haven't changed. This behavior was noted when serializing via json with the ServerTLSSettings_TLSmode TLSPassthrough. Since it is an iota of 0 it is omitted on submission to the api via protobuffer. When marshaling via json it is rendered.

Maybe serialization should be done via protobuf.