RFR: 8344229: Revisit SecurityManager usage in jdk.httpserver after JEP 486 integration [v2]

[Volkan Yazıcı]

> Removes `SecurityManager` and friends from `jdk.httpserver`. Will share `tier1..2` results soon.
> 
> **Methodology:** Case-insensitively and recursively searched for the occurrences of `("removal"|secu|privi)` in `httpserver`-named folders.

Volkan Yazıcı has updated the pull request incrementally with one additional commit since the last revision:

  Finalize constants in `ServerConfig`

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22510/files
  - new: https://git.openjdk.org/jdk/pull/22510/files/00ed942e..32fe1457

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22510&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22510&range=00-01

  Stats: 29 lines in 1 file changed: 1 ins; 3 del; 25 mod
  Patch: https://git.openjdk.org/jdk/pull/22510.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22510/head:pull/22510

PR: https://git.openjdk.org/jdk/pull/22510