RFR: 8327793: Deprecate jstatd for removal [v6]

[Kevin Walls]

> jstatd is an RMI server application which monitors HotSpot VMs, and provides an interface to the monitoring tool jstat, for use across a remote RMI connection.
> 
> RMI is not how modern applications communicate. It is an old transport with long term security concerns, and configuration difficulties with firewalls.
> 
> The jstatd tool should be removed. Deprecating and removing jstatd will not affect usage of jstat for monitoring local VMs using the Attach API.

Kevin Walls has updated the pull request incrementally with one additional commit since the last revision:

  wording

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19658/files
  - new: https://git.openjdk.org/jdk/pull/19658/files/3c7e86a1..1a240155

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19658&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19658&range=04-05

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19658.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19658/head:pull/19658

PR: https://git.openjdk.org/jdk/pull/19658