RFR: 8320788: The system properties page is missing some properties [v2]

[Naoto Sato]

> Adding an explanation of the locale-related system properties in the `System.getProperties()` method. Corresponding CSR has also been drafted.

Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:

  Reflects review comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/17317/files
  - new: https://git.openjdk.org/jdk/pull/17317/files/19128cc8..b1d31163

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17317&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17317&range=00-01

  Stats: 4 lines in 1 file changed: 0 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/17317.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17317/head:pull/17317

PR: https://git.openjdk.org/jdk/pull/17317