RFR: 8263080: Obsolete relationship in MulticastSocket API documentation.

Fri Mar 5 11:16:08 UTC 2021

Now that DatagramSocket has been updated by JDK-8237352 to support joining multicast group, this sentence in the API class level documentation of MulticastSocket is obsolete and should be removed:

"A MulticastSocket is a (UDP) DatagramSocket, with additional capabilities for
 joining "groups" of other multicast hosts on the internet." 

 Not sure whether this requires a CSR. I guess not?

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Commit messages:
 - 8263080: Obsolete relationship in MulticastSocket API documentation.

Changes: https://git.openjdk.java.net/jdk/pull/2842/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2842&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263080
  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2842.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2842/head:pull/2842

PR: https://git.openjdk.java.net/jdk/pull/2842