RFR: 8294985: SSLEngine throws IAE during parsing of X500Principal [v20]

[Kevin Driver]

> Fixes: [JDK-8294985](https://bugs.openjdk.org/browse/JDK-8294985)

Kevin Driver has updated the pull request incrementally with four additional commits since the last revision:

 - working testcase for CertificateRequest for TLS1.2
 - new version of second test
 - initial commit of second test
 - reintroduce bug id to test header

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/13466/files
  - new: https://git.openjdk.org/jdk/pull/13466/files/d9f0c667..b1382e57

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13466&range=19
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13466&range=18-19

  Stats: 217 lines in 2 files changed: 217 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13466.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13466/head:pull/13466

PR: https://git.openjdk.org/jdk/pull/13466