RFR: 8344217: Remove calls to SecurityManager and and doPrivileged in java.net.DatagramSocket and java.net.NetMulticastSocket after JEP 486 integration

[Daniel Fuchs]

Please find here a patch that removes use of SecurityManager and doPrivileged in DatagramSocket/MulticastSocket implementation.

Some allusion to the SecurityManager was missed in DatagramSocket::connect, so this patch contains a small API documentation change that will require a CSR.

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Commit messages:
 - 8344217: Remove calls to SecurityManager and and doPrivileged in java.net.DatagramSocket and java.net.NetMulticastSocket after JEP 486 integration

Changes: https://git.openjdk.org/jdk/pull/22303/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22303&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344217
  Stats: 123 lines in 2 files changed: 5 ins; 112 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/22303.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22303/head:pull/22303

PR: https://git.openjdk.org/jdk/pull/22303