Read newer LMC rules
Version 1.1.0 of Last Message Correction (0308) added clarifications that break the way poezio handles corrections. Instead of linking corrections to the previous correction/message as we were doing, we are now required to link all corrections to the original messages.
This breaks old-style LMC though, corrections from the second one don't get displayed (don't replace the message and appear nowhere), I don't understand why yet.
Signed-off-by: Maxime “pep” Buquet firstname.lastname@example.org