C2MS11 — Move Tracking Fields to a "Message Envelope"

Tracking fields do not specifically belong in a C2MS Message. Rather, there should be a message envelope that contains these fields for the purpose of delivering a contained C2MS message. Recommended here, is to define a C2MB Sister spec that encompasses the 'how' of sending C2MS messages. This is the logical place for managing tracking fields in a "Message Envelope".

This is clear when considering tracking fields, MW-INFO and CONNECTION-ID, which are message-bus handling constructs and have no meaning in C2MS itself.