Godeps/_workspace/src/gopkg.in/mgo.v2/socket.go
func (socket *mongoSocket) Server() *mongoServer {
	socket.Lock()
	server := socket.server
	socket.Unlock()
	return server
}
func (socket *mongoSocket) Server() *mongoServer {
	socket.Lock()
	server := socket.server
	socket.Unlock()
	return server
}
// Server returns the server that the socket is associated with.
// It returns nil while the socket is cached in its respective server.