[jcifs] Javadoc for all classes [patch]

[Michael B Allen]

Marcin Cieslak said:
> I have grabbed 1.1.8 recently and I've found that Javadoc is built only
> for few source files.

That is intentional.

> Javadoc also produced lots of warnings.

Fixes applied (mostly).

To be released RSN.

Thanks,
Mike