var crypto/elliptic.p256

5 uses

	crypto/elliptic (current package)
		elliptic.go#L145: var _ = []unmarshaler{p224, p256, p384, p521}
		elliptic.go#L255: 	return p256
		nistec.go#L34: var p256 = &p256Curve{nistCurve[*nistec.P256Point]{
		nistec.go#L39: 	p256.params = &CurveParams{
		params.go#L328: 	for _, c := range []Curve{p224, p256, p384, p521} {