RFR: 8345223: Remove stray doPrivileged in java.base java.net and sun.net classes after JEP 486 integration [v3]

[Daniel Fuchs]

> Some doPrivileged were missed in some net classes when working on previous cleanups.

Daniel Fuchs has updated the pull request incrementally with one additional commit since the last revision:

  Further cleanup. Removed stray privilegedGetProperty. Updated issue title

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22447/files
  - new: https://git.openjdk.org/jdk/pull/22447/files/d2b262c7..c67ca55d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22447&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22447&range=01-02

  Stats: 13 lines in 3 files changed: 1 ins; 3 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/22447.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22447/head:pull/22447

PR: https://git.openjdk.org/jdk/pull/22447