RFR: 8288493: Document JDK specific system properties in jdk.httpserver [v9]

[Michael McMahon]

> Hi,
> 
> This change adds some documentation to the jdk.httpserver module-info listing all of the system properties used by the implementation and which can be set by users.
> 
> CSR at https://bugs.openjdk.org/browse/JDK-8295667
> 
> Thanks,
> Michael.

Michael McMahon has updated the pull request incrementally with one additional commit since the last revision:

  Review update

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10766/files
  - new: https://git.openjdk.org/jdk/pull/10766/files/bdd0e888..49d34b93

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10766&range=08
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10766&range=07-08

  Stats: 10 lines in 3 files changed: 7 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/10766.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10766/head:pull/10766

PR: https://git.openjdk.org/jdk/pull/10766