We need to add support for solaris specific SO_FLOW_SLA socket option, probably in jdk.net
as jdk.net.SocketFlow and jdk.net.ExtendedSocketOptions which defines
SocketOption<SocketFlow> SO_FLOW_SLA which makes it available to NIO socket channels on its own.

Additionally, support for java.net socket types could be added in jdk.net through a support class with
static set/getOption methods that take the java.net socket types. But, it needs to be established whether only NIO or both NIO and classic socket use-cases are required.