RFR: 8344446: Remove security manager dependency from module jdk.sctp [v3]

[Brian Burkhalter]

> Expunge the use of the `SecurityManager`, `AccessController`, and the like from the `jdk.sctp` module.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8344446: Address more reviewer comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22225/files
  - new: https://git.openjdk.org/jdk/pull/22225/files/5e8c8d7a..a73a3138

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22225&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22225&range=01-02

  Stats: 2 lines in 2 files changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22225.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22225/head:pull/22225

PR: https://git.openjdk.org/jdk/pull/22225