[Mono-osx] patch: Mac OS X keychain API additions

[Miguel de Icaza]

Hello,

> One thing about the Keychain under MacOS is that the usage scenarios seem to be much richer than under iOS.
> For instance - multiple keychains are allowed. Or, ACLs on the keychain entries so only selected apps can access it.
> It would be probably useful to provide better mappings, which take into account this broader range of MacOS -specific scenarios.
> This would also depart a little bit of iOS keychain programming model (i.e. SecKeyChain wouldn't be a static class anymore etc).
>
> What do you think?

I would love to hear how this would change.   We can still make
changes to the API, but we might have to do those in a
backwards-compatible way, as we have current users of the API on
MonoTouch as-is.

Miguel