RFR: 8303809: Dispose context in SPNEGO NegotiatorImpl [v4]

[Weijun Wang]

On Mon, 13 Mar 2023 17:33:12 GMT, Alexey Bakhtin <abakhtin at openjdk.org> wrote:

>> This patch fixes a possible native memory leak in case of a custom native GSS provider.
>> The actual leak was reported in production.
>> 
>> sun/security/jgss, sun/security/krb5, sun/net/www/protocol/http jtreg tests are passed
>
> Alexey Bakhtin has updated the pull request incrementally with one additional commit since the last revision:
> 
>   More space after catch

Marked as reviewed by weijun (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/12920