RFR: 8274205: Handle KDC_ERR_SVC_UNAVAILABLE error code from KDC

[Weijun Wang]

On Thu, 23 Sep 2021 16:52:07 GMT, Alexey Bakhtin <abakhtin at openjdk.org> wrote:

> The code change handles KDC_ERR_SVC_UNAVAILABLE error code (29) received from KDC and resends the initial request to the next KDC in the list. It aligns error code handling with the MIT Kerberos implementation.
> sun/security/krb5 tests passed

The code change looks fine to me. I'd like to contribute a regression test. Please wait for several hours.

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PR: https://git.openjdk.java.net/jdk/pull/5658