[jdk17u] RFR: 8274779: HttpURLConnection: HttpClient and HttpsClient incorrectly check request method when set to POST

[Evan Whelan]

Hi,

Please review my clean backport of JDK-8274779.

No related test failures.

Thanks in advance,
Evan

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

Commit messages:
 - 8274779: HttpURLConnection: HttpClient and HttpsClient incorrectly check request method when set to POST

Changes: https://git.openjdk.java.net/jdk17u/pull/212/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=212&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274779
  Stats: 177 lines in 4 files changed: 175 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk17u/pull/212.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u pull/212/head:pull/212

PR: https://git.openjdk.java.net/jdk17u/pull/212