RFR[8246047]: 'Replace LinkedList impl in net.http.websocket.BuilderImpl'

[Chris Hegarty]

> On 14 Aug 2020, at 16:48, Conor Cleary <conor.cleary at oracle.com> wrote:
> 
> Thanks for the suggestion Daniel, looks much nicer without the casting in the immutableCopy function as well!
> 
> I made a new patch with those reverted changes and it looks much nicer and still behaves as expected.
> 
> webrev: http://cr.openjdk.java.net/~ccleary/issues/webrevs-store/8246047/webrevs/webrev.03/
> 
LGTM.

-Chris