Investigate if we can turn headers into a LIFO stack. When travelling down, protocols push headers onto the stack. When travelling up, protocols pop headers (if the IDs match).

This would allow us to solve issues such as [1].

Problems to look at:

• Retransmission: remove all headers in the retransmission table, as they are added again? Otherwise headers might get pushed multiple times. Or check whether a header is already present when pushing a header?

[1] https://issues.redhat.com/browse/JGRP-2729