RFR 8044860: Vectors and fixed length fields should be verified for allowed sizes

[Jamil Nimeh]

Hi all,

This review is to provide length checks on the session ID for SSL/TLS 
connections.  It appears to be the only vector/array that needs 
additional length-checks to make sure it's not exceeding 32 bytes.

Bug: https://bugs.openjdk.java.net/browse/JDK-8044860
Webrev: http://cr.openjdk.java.net/~jnimeh/reviews/8044860/webrev.01

Thanks,
--Jamil