[jdk11u] RFR: 8286594: (zipfs) Mention paths with dot elements in ZipException and cleanups

[Martin Doerr]

On Wed, 1 Jun 2022 15:51:09 GMT, Christoph Langer <clanger at openjdk.org> wrote:

> The backport needed some resolving/adaptation to older zipfs code.
> Method IndexNode:toString is not implemented, so this part of the upstream patch does not apply.

Ok, the hunk is omitted, because [JDK-8222276](https://bugs.openjdk.java.net/browse/JDK-8222276) and [JDK-8213031](https://bugs.openjdk.java.net/browse/JDK-8213031) are not in 11u.
I noticed that you are also backporting [JDK-8286444](https://bugs.openjdk.java.net/browse/JDK-8286444) and [JDK-8286855](https://bugs.openjdk.java.net/browse/JDK-8286855).
Makes sense.

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Marked as reviewed by mdoerr (Reviewer).

PR: https://git.openjdk.java.net/jdk11u/pull/38