MINOR: peers: Add traces for peer control messages.

Display traces when sending/receiving peer control messages (synchronisation, heartbeat).
Add remaining traces when parsing malformed messages (acks, stick-table definitions)
or ignoring them.
Also add traces when releasing session or when reaching the PEER_SESS_ST_ERRPROTO
peer protocol state.

(cherry picked from commit da2b0844fc4eafd9c63e3eb20a1a7020d9f92088)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed