[jdk17u-dev] RFR: 8293489: Accept CAs with BasicConstraints without pathLenConstraint

[Goetz Lindenmaier]

I backport this for parity with 17.0.6-oracle.

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Commit messages:
 - Backport 986b834148f425aa21611814d162a8578b26b502

Changes: https://git.openjdk.org/jdk17u-dev/pull/815/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=815&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293489
  Stats: 73 lines in 1 file changed: 73 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/815.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/815/head:pull/815

PR: https://git.openjdk.org/jdk17u-dev/pull/815