RFR: 8133816: Display extra SSLServerSocket info in debug mode [v3]

[Weibing Xiao]

> Log the debugging info for server cipher suites when setting javax.net.debug == ssl, handshake.

Weibing Xiao has updated the pull request incrementally with one additional commit since the last revision:

  update the code according to review comments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/9731/files
  - new: https://git.openjdk.org/jdk/pull/9731/files/68a12183..d60b219b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9731&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9731&range=01-02

  Stats: 28 lines in 2 files changed: 2 ins; 9 del; 17 mod
  Patch: https://git.openjdk.org/jdk/pull/9731.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9731/head:pull/9731

PR: https://git.openjdk.org/jdk/pull/9731