[jdk17u-dev] RFR: 8301306: java/net/httpclient/* fail with -Xcomp

[Goetz Lindenmaier]

I backport this because we see issues with these tests in our CI.

HttpClientLocalAddrTest.java and HttpALot.java are not in 17, skipped.

SpecialHeadersTest.java resolved due to context.

I also include follow-up 8301787: java/net/httpclient/SpecialHeadersTest failing after JDK-8301306
to avoid the test to fail.

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Commit messages:
 - 8301787: java/net/httpclient/SpecialHeadersTest failing after JDK-8301306
 - Backport 6f9106e0d0d9f082f0a61009f95d1b8663dd8d4f

Changes: https://git.openjdk.org/jdk17u-dev/pull/2011/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2011&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301306
  Stats: 9 lines in 5 files changed: 1 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2011.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2011/head:pull/2011

PR: https://git.openjdk.org/jdk17u-dev/pull/2011