RFR: 8343395: SSLLogger doesn't work for formatted messages [v2]

[Sean Coffey]

> SLSLogger is broken when used with with `System.Logger` (-Djavax.net.debug mode)
> 
> SSL Debug messages don't use format specifiers. As a result, any custom format data isn't printed. Proposed solution is to append the SSL custom format output to the original debug message. Similar approach used for `SSLConsoleLogger ` mode.
> 
> Used this opportunity to delete some old commented code and to replace use of `"\n"` with `System.lineSeparator()`
> 
> DebugPropertyValuesTest also updated to test new logic.

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

  Text Blocks use \n by default

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25934/files
  - new: https://git.openjdk.org/jdk/pull/25934/files/9e589a63..51eb0f1b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25934&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25934&range=00-01

  Stats: 7 lines in 3 files changed: 2 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/25934.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25934/head:pull/25934

PR: https://git.openjdk.org/jdk/pull/25934