RFR: JDK-8061729 : Update java/net tests to eliminate dependency on sun.net.www.MessageHeader and some other internal APIs [v5]

[Mahendra Chhipa]

On Fri, 11 Feb 2022 11:15:56 GMT, Mahendra Chhipa <duke at openjdk.java.net> wrote:

>> There are some regression tests depending on sun.net.www.MessageHeader, the internal API dependency should be removed. Some of other internal API dependancies are removed in following issues :
>> JDK-8273142
>> JDK-8268464
>> JDK-8268133
>
> Mahendra Chhipa has updated the pull request incrementally with one additional commit since the last revision:
> 
>   1. Handled continuation line
>   2. handled \r, \n, or \r\n
>   3. Added the test for HttpHeaderParser class

Mach5 results : https://mach5.us.oracle.com/mdash/jobs/mahendrachhipa-jdk-20220210-1911-29009006

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PR: https://git.openjdk.java.net/jdk/pull/5937