RFR: 8335181: Incorrect handling of HTTP/2 GOAWAY frames in HttpClient [v6]

[Jaikiran Pai]

> Can I please get a review of this change which fixes the issue noted in https://bugs.openjdk.org/browse/JDK-8335181?
> 
> As noted in that issue, the current implementation in the `java.net.http.HttpClient` doesn't correctly handle an incoming GOAWAY frame. The HTTP3 RFC https://www.rfc-editor.org/rfc/rfc9113#name-goaway notes the specifics on what the expectations are when an endpoint receives a GOAWAY frame from the peer.
> 
> Before the changes proposed in this PR, the HttpClient implementation would (incorrectly) shutdown the connection and abort requests when a GOAWAY frame was received. The changes in this PR fixes that by retrying relevant unprocessed requests (if any) and not initiating any new streams on the connection.
> 
> A new test has been introduced to exercise this detail. The test continues to pass along with other existing tests. tier testing as well as a repeated testing (with test-repeat 50) is currently in progress with this change.

Jaikiran Pai has updated the pull request incrementally with 111 additional commits since the last revision:

 - also decrement streams to allow the HttpClient to close
 - 8336384: AbstractQueuedSynchronizer.acquire should cancel acquire when failing due to a LinkageError or other errors
   
   Reviewed-by: alanb
 - 8338202: Shenandoah: Improve handshake closure labels
   
   Reviewed-by: rkennke, ysr, wkemper
 - 8334475: UnsafeIntrinsicsTest.java#ZGenerationalDebug assert(!assert_on_failure) failed: Has low-order bits set
   
   Reviewed-by: stefank, eosterlund, aboldtch
 - 8338155: Fix -Wzero-as-null-pointer-constant warnings involving PTHREAD_MUTEX_INITIALIZER
   
   Reviewed-by: dholmes, dlong
 - 8338124: C2 SuperWord: MulAddS2I input permutation still partially broken after JDK-8333840
   
   Reviewed-by: chagedorn, thartmann, kvn
 - 8335628: C2 SuperWord: cleanup: remove SuperWord::longer_type_for_conversion
   
   Reviewed-by: chagedorn, kvn
 - 8338154: Fix -Wzero-as-null-pointer-constant warnings in gtest framework
   
   Reviewed-by: ihse, dholmes, jwaters
 - 8338248: PartialArrayStateAllocator::Impl leaks Arena array
   
   Reviewed-by: kbarrett, shade
 - 8338160: Fix -Wzero-as-null-pointer-constant warnings in management.cpp
   
   Reviewed-by: dholmes
 - ... and 101 more: https://git.openjdk.org/jdk/compare/7365f09b...fb4ecae7

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/20442/files
  - new: https://git.openjdk.org/jdk/pull/20442/files/7365f09b..fb4ecae7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20442&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20442&range=04-05

  Stats: 14518 lines in 514 files changed: 5720 ins; 6714 del; 2084 mod
  Patch: https://git.openjdk.org/jdk/pull/20442.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20442/head:pull/20442

PR: https://git.openjdk.org/jdk/pull/20442