Remove HASH_PREFERRED, usages are replaced with HASH_SHA1, which is required for IKEv2 anyway

src/libstrongswan/plugins/af_alg/af_alg_hasher.c

@@ -47,13 +47,13 @@ static struct {
 	char *name;
 	size_t size;
 } algs[AF_ALG_HASHER] = {
-	{HASH_SHA1,			"sha1",			HASH_SIZE_SHA1		},
+	{HASH_MD4,			"md4",			HASH_SIZE_MD4 		},
 	{HASH_MD5,			"md5",			HASH_SIZE_MD5 		},
+	{HASH_SHA1,			"sha1",			HASH_SIZE_SHA1		},
 	{HASH_SHA224,		"sha224",		HASH_SIZE_SHA224	},
 	{HASH_SHA256,		"sha256",		HASH_SIZE_SHA256	},
 	{HASH_SHA384,		"sha384",		HASH_SIZE_SHA384	},
 	{HASH_SHA512,		"sha512",		HASH_SIZE_SHA512	},
-	{HASH_MD4,			"md4",			HASH_SIZE_MD4 		},
 };
 
 /**