[jdk15u-dev] RFR: 8254631: Better support ALPN byte wire values in SunJSSE

[Alexey Bakhtin]

Applies cleanly, but the javadoc parts are removed as documented in CSR JDK-8271938
sun/security/ssl/ALPN test passed

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Commit messages:
 - Backport fe5cccc1ec76a5c29b1f55af311823f84483395b

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/89/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=89&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8254631
  Stats: 345 lines in 3 files changed: 336 ins; 1 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk15u-dev/pull/89.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/89/head:pull/89

PR: https://git.openjdk.java.net/jdk15u-dev/pull/89