RFR 8056174: New APIs for jar signing

[Sean Mullan]

>> Function: are you missing an @modules tag for the jarsigner module?
>
> Which one? I thought @modules is only used if you want to call
> non-exported classes.

Ok, never mind then.

>> Options.java: why not use the JarSigner API here instead of the
>> jarsigner tool?
>
> This test is to make sure jarsigner still behaves correctly after it is
> modified to be based on the JarSigner API. As for the API itself, I use
> Function.java to check its function and Spec.java to check it's spec.
>
> I'll add some @summary.

Ok, thanks.

--Sean