remove elliptic.P224 usage

Fedora/RedHat distros comply with US patent law and remove this curve,
which makes it impossible to run ipfs with distro provided Golang.

License: MIT
Signed-off-by: Pavol Rusnak <stick@gk2.sk>

p2p/crypto/key.go

@@ -102,8 +102,6 @@ func GenerateEKeyPair(curveName string) ([]byte, GenSharedKey, error) {
 	var curve elliptic.Curve
 
 	switch curveName {
-	case "P-224":
-		curve = elliptic.P224()
 	case "P-256":
 		curve = elliptic.P256()
 	case "P-384":

p2p/crypto/secio/al.go

@@ -18,7 +18,7 @@ import (
 )
 
 // List of supported ECDH curves
-var SupportedExchanges = "P-256,P-224,P-384,P-521"
+var SupportedExchanges = "P-256,P-384,P-521"
 
 // List of supported Ciphers
 var SupportedCiphers = "AES-256,AES-128,Blowfish"