RFR: 8320219: Actually resolve issues with goto labels in sspi

[Julian Waters]

I regret not actually addressing the issues with the goto labels in https://github.com/openjdk/jdk/pull/15996, I've as such fixed the issues with them properly this time, by simply deleting the labels and duplicating the code where they're used. As mentioned, this unfortunately does increase duplicate code, but is the cleanest solution I could come up with for the labels

-------------

Commit messages:
 - Actually resolve issues with goto labels in sspi

Changes: https://git.openjdk.org/jdk/pull/16682/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16682&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320219
  Stats: 92 lines in 1 file changed: 52 ins; 19 del; 21 mod
  Patch: https://git.openjdk.org/jdk/pull/16682.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16682/head:pull/16682

PR: https://git.openjdk.org/jdk/pull/16682