RFR: JDK-8262435: Clarify the behavior of a few inherited ZipInputStream methods [v7]

[Lance Andersen]

> Please review the following PR which updates several of the ZipInputStream methods whose javadoc is inherited to clarify the methods  are acting on  the current ZIP Entry.
> 
> There are no changes in behavior.  The main description for the method's javadoc that has been copied has been clarified and the remaining doc is the same.

Lance Andersen has updated the pull request incrementally with one additional commit since the last revision:

  Remove always from  available()

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/10995/files
  - new: https://git.openjdk.org/jdk/pull/10995/files/619a39c5..665dcaf6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10995&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10995&range=05-06

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10995.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10995/head:pull/10995

PR: https://git.openjdk.org/jdk/pull/10995