To that effect, bump liberty and the xC relay protocol version.
Relay events have been reordered to improve forward compatibility.
Also prevent use-after-free when serialization fails.
xP now slightly throttles activity notifications,
and indicates when there are unacknowledged commands.
I've come to the conclusion that copyright mostly just stands in the way
of software development. In my jurisdiction I cannot give up my own
copyright and 0BSD seems to be the closest thing to public domain.
The updated mail address, also used in my author/committer lines,
is shorter and looks nicer. People rarely interact anyway.
