[jdk17u] RFR: 8274205: Handle KDC_ERR_SVC_UNAVAILABLE error code from KDC

[Alexey Bakhtin]

Clean backport of KDC_ERR_SVC_UNAVAILABLE error code issue.

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Commit messages:
 - Backport 5ba0d09fe47439880daf913f4ff0b978ed9c1ac6

Changes: https://git.openjdk.java.net/jdk17u/pull/207/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=207&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274205
  Stats: 88 lines in 3 files changed: 86 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk17u/pull/207.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u pull/207/head:pull/207

PR: https://git.openjdk.java.net/jdk17u/pull/207