RFR: X509Certificate.get{Subject,Issuer}AlternativeNames and getExtendedKeyUsage do not throw CertificateParsingException if extension is unparseable [v3]

[Sean Mullan]

> The JDK implementation (as supplied by the "SUN" provider) of `X509Certificate::getSubjectAlternativeNames` and `X509Certificate::getIssuerAlternativeNames` returns `null` instead of throwing a `CertificateParsingException` when the extension is unparseable.
> 
> This fix changes the behavior to comply with the specification.
> 
> CSR: https://bugs.openjdk.java.net/browse/JDK-8275822

Sean Mullan has updated the pull request incrementally with one additional commit since the last revision:

  Fix NPE.

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6106/files
  - new: https://git.openjdk.java.net/jdk/pull/6106/files/10172038..371a384d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6106&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6106&range=01-02

  Stats: 9 lines in 1 file changed: 9 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6106.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6106/head:pull/6106

PR: https://git.openjdk.java.net/jdk/pull/6106