RFR: 8343395: SSLLogger doesn't work for formatted messages [v7]

[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:

  Avoid Supplier API call

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25934/files
  - new: https://git.openjdk.org/jdk/pull/25934/files/bb0df658..beba07b2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25934&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25934&range=05-06

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 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