session: clear prefix on lookup

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

session/manager.go

@@ -150,6 +150,12 @@ func (sm *Manager) handleConn(ctx context.Context, conn net.Conn, opts map[strin
 
 // Get returns a session by ID
 func (sm *Manager) Get(ctx context.Context, id string) (Caller, error) {
+	// session prefix is used to identify vertexes with different contexts so
+	// they would not collide, but for lookup we don't need the prefix
+	if p := strings.SplitN(id, ":", 2); len(p) == 2 && len(p[1]) > 0 {
+		id = p[1]
+	}
+
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()