Content of Hashtable `com.sun.jndi.ldap.LdapClient#defaultBinaryAttrs` is fully initialized in `<clinit>` block. It means we can replace legacy synchronized `Hashtable` with immutable set.
------------- Commit messages: - [PATCH] Unnecessary Hashtable usage in LdapClient.defaultBinaryAttrs Changes: https://git.openjdk.org/jdk/pull/21903/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21903&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8344023 Stats: 29 lines in 1 file changed: 1 ins; 9 del; 19 mod Patch: https://git.openjdk.org/jdk/pull/21903.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/21903/head:pull/21903 PR: https://git.openjdk.org/jdk/pull/21903
