Initial QSfera import

Server/vendor/github.com/lestrrat-go/jwx/v3/jwa/secp2561k.go

@@ -0,0 +1,14 @@
+//go:build jwx_es256k
+
+package jwa
+
+var secp256k1Algorithm = NewEllipticCurveAlgorithm("secp256k1")
+
+// This constant is only available if compiled with jwx_es256k build tag
+func Secp256k1() EllipticCurveAlgorithm {
+	return secp256k1Algorithm
+}
+
+func init() {
+	RegisterEllipticCurveAlgorithm(secp256k1Algorithm)
+}