[Sheepdog] Increase performance

[Peter Fern]

On 08/06/11 00:29, Steven Dake wrote:
> ATM there is no encryption/signing at all, so best place to start would
> be to implement that feature.

Since Corosync is used for synchronisation, the easy option would be to
simply use the built-in encryption for Corosync, no?  Unfortunately,
this is HMAC/SHA1 + sober128, so again no acceleration extensions, is
there a reason to implement another encryption layer?