include/protocol-versions.h specifies each extension version as supported by
the server and sent back on the wire to the client.
This fixes up several issues with the server potentially reporting a higher
version of the protocol if recompiled against a newer version of the
Signed-off-by: Peter Hutterer <email@example.com>
Acked-by: Rémi Cardona <firstname.lastname@example.org>
Acked-by: Julien Cristau <email@example.com>