The SO_FLOW_SLA Solaris socket option has been removed

This rule flags references to the Solaris jdk.net.ExtendedSocketOptions.SO_FLOW_SLA socket option as well as the related jdk.net.SocketFlow and jdk.net.SocketFlow.Status classes, which have been removed in Java 15 due to the removal of the Solaris port. Remove any usage of the constant and classes in your application.

For more information on these changes, see Removed Features and Options in Java SE 15.