Godeps/_workspace/src/gopkg.in/mgo.v2/session.go
func (s *Session) unsetSocket() {
	if s.masterSocket != nil {
		s.masterSocket.Release()
	}
	if s.slaveSocket != nil {
		s.slaveSocket.Release()
	}
	s.masterSocket = nil
	s.slaveSocket = nil
}
func (s *Session) unsetSocket() {
	if s.masterSocket != nil {
		s.masterSocket.Release()
	}
	if s.slaveSocket != nil {
		s.slaveSocket.Release()
	}
	s.masterSocket = nil
	s.slaveSocket = nil
}
// unsetSocket releases any slave and/or master sockets reserved.