RFR: 8261513: Various BasicConstraintsExtension issues [v3]

[Ben Perez]

> 8261513: Various BasicConstraintsExtension issues

Ben Perez 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 three additional commits since the last revision:

 - Merge branch 'master' into JDK-8261513
 - Added IOException for negative pathLenConstraint
 - Changed constructor, getPathLen, and toString to return a canonical representation for unconstrained pathLens

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20224/files
  - new: https://git.openjdk.org/jdk/pull/20224/files/c04afb03..64398d5c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20224&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20224&range=01-02

  Stats: 1074565 lines in 14088 files changed: 660798 ins; 324690 del; 89077 mod
  Patch: https://git.openjdk.org/jdk/pull/20224.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20224/head:pull/20224

PR: https://git.openjdk.org/jdk/pull/20224