docs/179801: [patch] jdk16 is deprecated, reflect within documentation

[Jason Helfman]

> Shouldn't the Linux part also be dropped?  If so, that makes this page
> mostly useless.
>
>
> --
> Eitan Adler
>
>
Perhaps this is an opportunity to document installing openjdk7 and
encourage users to
use it, while openjdk6 is more than likely on deprecation path.

-jgh

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Jason Helfman          | FreeBSD Committer
jgh at FreeBSD.org     | http://people.freebsd.org/~jgh  | The Power to Serve