[IPSEC]: Add compatibility algorithm name support

This patch adds a compatibility name field for each IPsec algorithm.  This
is needed when parameterised algorithms are used.  For example, "md5" will
become "hmac(md5)", and "aes" will become "cbc(aes)".

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

net/xfrm/xfrm_user.c

@@ -213,6 +213,7 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
 		return -ENOMEM;
 
 	memcpy(p, ualg, len);
+	strcpy(p->alg_name, algo->name);
 	*algpp = p;
 	return 0;
 }