Add terminal messages upon session closing

internal/multiplex/session.go

@@ -173,6 +173,7 @@ func (sesh *Session) timeoutAfter(to time.Duration) {
 	sesh.streamsM.Lock()
 	if len(sesh.streams) == 0 && !sesh.IsBroken() {
 		sesh.streamsM.Unlock()
+		sesh.SetTerminalMsg("timeout")
 		sesh.Close()
 	} else {
 		sesh.streamsM.Unlock()

internal/multiplex/switchboard.go

@@ -105,6 +105,7 @@ func (sb *switchboard) removeConn(closing *connEnclave) {
 		}
 	}
 	if len(sb.ces) == 0 {
+		sb.session.SetTerminalMsg("no underlying connection left")
 		sb.session.Close()
 	}
 	sb.cesM.Unlock()

internal/server/activeuser.go

@@ -48,7 +48,6 @@ func (u *ActiveUser) GetSession(sessionID uint32, obfs mux.Obfser, deobfs mux.De
 	}
 }
 
-// TODO: allow message to pass through this and sesh.Close()
 func (u *ActiveUser) Terminate(reason string) {
 	u.sessionsM.Lock()
 	for _, sesh := range u.sessions {