RFR: 8351349: GSSUtil.createSubject has outdated access control context and policy related text [v2]

[Sean Mullan]

> Please review this change to remove outdated access control context and policy related text from the `com.sun.security.jgss.GSSUtil` class which no longer applies now that JEP 486 disabled the Security Manager. 
> 
> I also made a few other minor changes, adding code tags around class names and changing "Sun Microsystem's" to "the JDK" in the class description.
> 
> I will also file a CSR.

Sean Mullan has updated the pull request incrementally with one additional commit since the last revision:

  Restore part of second sentence. Move @return to end.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/23970/files
  - new: https://git.openjdk.org/jdk/pull/23970/files/c5c20178..3aff705e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23970&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23970&range=00-01

  Stats: 11 lines in 1 file changed: 4 ins; 3 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/23970.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23970/head:pull/23970

PR: https://git.openjdk.org/jdk/pull/23970