RFR: 8303965: java.net.http.HttpClient should reset the stream if response headers contain malformed header fields [v4]

[Daniel Fuchs]

> According to RFC 9113:
> 
> A malformed request or response is one that is an otherwise valid sequence of HTTP/2 frames but is invalid due to the presence of extraneous frames, prohibited fields or pseudo-header fields, the absence of mandatory pseudo-header fields, the inclusion of uppercase field names, or invalid field names and/or values (in certain circumstances; see [Section 8.2](https://www.rfc-editor.org/rfc/rfc9113#HttpHeaders)).
> [...]
> Malformed requests or responses that are detected MUST be treated as a [stream error](https://www.rfc-editor.org/rfc/rfc9113#StreamErrorHandler) ([Section 5.4.2](https://www.rfc-editor.org/rfc/rfc9113#StreamErrorHandler)) of type [PROTOCOL_ERROR](https://www.rfc-editor.org/rfc/rfc9113#PROTOCOL_ERROR).
> 
> The current behavior is to close the connection with protocol error. This change makes it reset the stream instead.

Daniel Fuchs 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 seven additional commits since the last revision:

 - Typo
 - Merge branch 'master' into MalformedResponse-8303965
 - Update src/java.net.http/share/classes/jdk/internal/net/http/common/ValidatingHeadersConsumer.java
   
   Refer to RFC 9113
 - Update src/java.net.http/share/classes/jdk/internal/net/http/Stream.java
   
   Refer to RFC 9113
 - add bug id to test
 - Merge branch 'master' into MalformedResponse-8303965
 - 8303965

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/12976/files
  - new: https://git.openjdk.org/jdk/pull/12976/files/92d5eb6c..b81e05aa

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12976&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12976&range=02-03

  Stats: 3590 lines in 112 files changed: 1432 ins; 1634 del; 524 mod
  Patch: https://git.openjdk.org/jdk/pull/12976.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12976/head:pull/12976

PR: https://git.openjdk.org/jdk/pull/12976