upstream: in OpenSSH private key format, correct type for subsequent

private keys in blob. From Jakub Jelen via GHPR430

OpenBSD-Commit-ID: d17dbf47554de2d752061592f95b5d772baab50b

Author: djmdjm

PROTOCOL.key

@@ -40,7 +40,7 @@ of the cipher block size.
 	byte[]	privatekey2
 	string	comment2
 	...
-	string	privatekeyN
+	byte[]	privatekeyN
 	string	commentN
 	byte	1
 	byte	2
@@ -68,4 +68,4 @@ For unencrypted keys the cipher "none" and the KDF "none"
 are used with empty passphrases. The options if the KDF "none"
 are the empty string.
 
-$OpenBSD: PROTOCOL.key,v 1.3 2022/07/01 04:45:50 djm Exp $
+$OpenBSD: PROTOCOL.key,v 1.4 2024/03/30 05:56:22 djm Exp $