RFR: 8327818: Implement Kerberos debug with sun.security.util.Debug [v8]

[Weijun Wang]

> Change `Krb5LoginModule` debugging to use `sun.security.util.Debug`.

Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:

  Seán's comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18199/files
  - new: https://git.openjdk.org/jdk/pull/18199/files/3491a4c7..94d0b4ea

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18199&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18199&range=06-07

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/18199.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18199/head:pull/18199

PR: https://git.openjdk.org/jdk/pull/18199