CSR Review Request, JDK-8213577, Update the default SSL session cache size to 20480

[Xuelei Fan]

Hi,

Please review the proposal to update the default SSL session cache size 
from infinite to 20480.
  https://bugs.openjdk.java.net/browse/JDK-8213577
I know that the default 20480 does not fit all.  I'd appreciate your 
feedback if the value is acceptable.

Thanks,
Xuelei