RFR: 8209137: Add ability to bind to specific local address to HTTP client [v9]

[Jaikiran Pai]

On Tue, 7 Dec 2021 14:28:01 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>> Jaikiran Pai has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   minor - rename variable in test
>
> Generally it would be good if the test did not make any assumption on the presence - or absence - of either IPv4 or IPv6 on the tested machine.
> The IPSupport test library class has methods that allows a test to inquire whether IPv6 or IPv4 are available - I would recommend using them to figure out which test cases can be tested on the machine the test runs on.

@dfuch Hello Daniel, on a slightly unrelated note I see there's a PR which tries to address too many HTTPClient instances resulting in odd failures on Windows https://github.com/openjdk/jdk/pull/7263. 

In this current PR of mine, I have a new test `HttpClientLocalAddrTest` which will end up creating (atmost) 20 HTTPClient instances. In my runs so far, I haven't seen any failures due to the number of instances, but I don't have a Windows setup to verify if these many clients can end up creating any issues on them. Unlike the change in that other PR which reduces the HTTPClient instance to just one, we won't be able to use that trick here since this whole test intentionally attempts to create multiple different instance of the HTTPClient. I hope this won't cause any issues on those Windows setups.

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PR: https://git.openjdk.java.net/jdk/pull/6690