RFR: 8284780: Need methods to create pre-sized HashSet and LinkedHashSet [v17]

[Daniel Fuchs]

On Fri, 27 May 2022 18:40:32 GMT, XenoAmess <duke at openjdk.java.net> wrote:

>> as title.
>
> XenoAmess has updated the pull request incrementally with one additional commit since the last revision:
> 
>   do it as naotoj said

Changes to `net` and `http` look good.

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Marked as reviewed by dfuchs (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/8302