C2MS — Add DESTINATION-COMPONENT field to the header and to the Miscellaneous Elements of REQ, RESP, and MSG messages that are associated with a REQ

Add an optional message field of type HEADER STRING called DESTINATION-COMPONENT to all messages, via the message header. Reasoning: many C2MS messages already specify to add this value to one of the miscellaneous subject elements. This change is to make consistent the desire that all subject elements are also elements of the message body; note that COMPONENT (name of the sender) is already a field in the message header.

Add DESTINATION-COMPONENT to the message header and appropriate messages' miscellaneous elements

Add an optional message field of type HEADER STRING called DESTINATION-COMPONENT to all messages, by adding it to the message header. Reasoning: many C2MS messages already specify to add this value to one of the miscellaneous subject elements.