RFR: 8286575: Document how properties in java.security are parsed

[Sean Coffey]

A doc edit to indicate that modifications of values in java.security conf file would require a JVM restart in order for such changes to be detected.

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Commit messages:
 - 8286575: Document how properties in java.security are parsed

Changes: https://git.openjdk.org/jdk/pull/11208/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11208&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8286575
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/11208.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11208/head:pull/11208

PR: https://git.openjdk.org/jdk/pull/11208