CSR-RFR: 8256817: Better support ALPN byte wire values in SunJSSE

[Bradford Wetmore]

Hi Xuelei/Jamil/Tony/others(?),

I need a reviewer for this CSR, in preparation for:
    CSR:  https://bugs.openjdk.java.net/browse/JDK-8256817
    Bug:  https://bugs.openjdk.java.net/browse/JDK-8254631

    Draft Change:  https://github.com/openjdk/jdk/pull/1440

    8254631: Better support ALPN byte wire values in SunJSSE

It is the same approach as we have discussed internally, but after 
further analysis, I now consider the interoperability risk minimal due 
to a latent bug that was discovered during prototyping/testing.

I'd like to get this putback into JDK 16, so will need to be reviewed 
shortly after break to make the mid-December RDP1 deadline.

Thanks,

Brad