[jdk18u] RFR: 8280414: Memory leak in DefaultProxySelector

[Matthias Baesken]

8280414: Memory leak in DefaultProxySelector

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

Commit messages:
 - Backport fe77250fa450ec803d2818dc90c5bf156521d537

Changes: https://git.openjdk.java.net/jdk18u/pull/12/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=12&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8280414
  Stats: 11 lines in 1 file changed: 1 ins; 3 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/12.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/12/head:pull/12

PR: https://git.openjdk.java.net/jdk18u/pull/12