Refactor parsing of messages to support easier

[TimEvens]

protocol changes.

• Change ShortName to MsgShortName
• MsgShortName is now a union with spec and data
• Prepare to remove name class (no longer needed)
• Fix weird issue with Apple/M1/OSX with port reuse

[fluffy]

This looks good to me, if you think it is ready for merge, merge it. Thanks for making it a PR as way easier to review.