RFR: 8327793: Deprecate jstatd for removal [v5]

[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 with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 10 additional commits since the last revision:

 - Merge remote-tracking branch 'upstream/master' into 8327793_jstatd_deprecate
 - Remove annotations
 - Replace (C)
 - Remove annotations
 - No annotations for src/jdk.jstatd/share/classes/sun/jvmstat/monitor/remote
 - Remove tmp file
 - Annotations
 - Annotations
 - Merge remote-tracking branch 'upstream/master' into 8327793_jstatd_deprecate
 - Basic deprecation of module, jstatd prints warning.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19658/files
  - new: https://git.openjdk.org/jdk/pull/19658/files/ed386505..3c7e86a1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19658&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19658&range=03-04

  Stats: 27075 lines in 733 files changed: 18445 ins; 5705 del; 2925 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