func (s *Session) Refresh() {
	s.m.Lock()
	s.slaveOk = s.consistency != Strong
	s.unsetSocket()
	s.m.Unlock()
}
func (s *Session) Refresh() {
	s.m.Lock()
	s.slaveOk = s.consistency != Strong
	s.unsetSocket()
	s.m.Unlock()
}
// Refresh puts back any reserved sockets in use and restarts the consistency
// guarantees according to the current consistency setting for the session.