Allow `udp_preference_limit = 0` to force TCP. The reason for this bug is that it was read in a similar way as `kdc_timeout` and `max_retries`, both must be positive to have effect.
------------- Commit messages: - the fix Changes: https://git.openjdk.org/jdk/pull/19638/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19638&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8333772 Stats: 220 lines in 4 files changed: 188 ins; 9 del; 23 mod Patch: https://git.openjdk.org/jdk/pull/19638.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/19638/head:pull/19638 PR: https://git.openjdk.org/jdk/pull/19638
