Added MACs to ssh_harden-6.3p1.patch

Chose to use the encrypt-then-macs, as they should be more secure. Left
few SHA-2 for backwards compatibility.

See:
  http://openssh.com/txt/release-6.2
  http://www.thoughtcrime.org/blog/the-cryptographic-doom-principle/#2_ssh_plaintext_recovery

According to nmap, the default config uses the following MACs:

  mac_algorithms (19)
      hmac-md5-etm@openssh.com
      hmac-sha1-etm@openssh.com
      umac-64-etm@openssh.com
      umac-128-etm@openssh.com
      hmac-sha2-256-etm@openssh.com
      hmac-sha2-512-etm@openssh.com
      hmac-ripemd160-etm@openssh.com
      hmac-sha1-96-etm@openssh.com
      hmac-md5-96-etm@openssh.com
      hmac-md5
      hmac-sha1
      umac-64@openssh.com
      umac-128@openssh.com
      hmac-sha2-256
      hmac-sha2-512
      hmac-ripemd160
      hmac-ripemd160@openssh.com
      hmac-sha1-96
      hmac-md5-96

And now it's:

  mac_algorithms (4)
      hmac-sha2-256-etm@openssh.com
      hmac-sha2-512-etm@openssh.com
      hmac-sha2-256
      hmac-sha2-512