8217451: ExtendedSocketOptions should encapsulate support for SO_FLOW_SLA

[Chris Hegarty]

On 21/01/2019 17:41, Alan Bateman wrote:
> ExtendSocketOptions is the supporting class that the socket 
> implementations use for JDK-specific socket options. Vyom improved it 
> last year to select options based on the socket type but more is needed 
> to handle socket options that are specific to connecting or listening 
> sockets. As things stand, the Solaris specific SO_FLOW_SLA option is the 
> only one with this complication and it is currently special cased by 
> PlainSocketImpl. I want to push this special casing to 
> ExtendSocketOptions so that the special handing is in one place.
> 
> The proposed changes are here:
>    http://cr.openjdk.java.net/~alanb/8217451/webrev/index.html

Looks ok.

-Chris.