change MACs from hmac-sha1 to hmac-sha1, as specified in RFC 6668 and implemented in OpenSSH 5.9
OpenSSH HMAC: SHA1 -> SHA2-512
Merge branch 'patch-1' of https://github.com/ilf/duraconf into patch-1
Merge pull request #17 from ilf/patch-1

OpenSSH HMAC: SHA1 -> SHA2-512