Feature: Add "Magic Bit" to the FSS-000F (Simple Packet) format.

Feature: Add "Magic Bit" to the FSS-000F (Simple Packet) format.

Make the FSS-000F (Simple Packet) format more generalized and flexible by allowing other payload formats than only formally supporting FSS-000E (Payload).

This adds a new optional "Magic Block" that is designated via the "Magic Bit", which is the third bit from the left.

This should make it easy to store the Simple Packet as a local file.
This should make it easier for routing to optimize processing of the packet by quickly identifying the packet.

The "Control Block" and the "Size Block" have static sizes and positions, which should make it easy to identify the "Magic Block".
The third bit should be checked and then the "Magic Block" should be checked when trying to quickly identify the packet type via the "Magic Block".