[jdk17u-dev] RFR: 7036144: GZIPInputStream readTrailer uses faulty available() test for end-of-stream [v2]

[Todd V. Jonker]

> This is a clean backport of [d3f3011](https://github.com/openjdk/jdk/commit/d3f3011d56267360d65841da3550eca79cf1575b), originally authored by @archiecobbs and reviewed by @jaikiran
> 
> The corresponding backport for JDK21 is https://github.com/openjdk/jdk21u-dev/pull/1897
> 
> Testing:
> - [x] New regression test fails without the fix, passes with it
> - [x] linux-x86_64-server-release: headless tiers 1-3

Todd V. Jonker has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'openjdk:master' into gzip-fix
 - Backport d3f3011d56267360d65841da3550eca79cf1575b

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

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/3667/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/3667/files/88bf5687..dba504b3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3667&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3667&range=00-01

  Stats: 93973 lines in 1962 files changed: 62088 ins; 22750 del; 9135 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3667.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3667/head:pull/3667

PR: https://git.openjdk.org/jdk17u-dev/pull/3667