Update curve list size.
Don't change version number if session established

When sending an invalid version number alert don't change the
version number to the client version if a session is already
established.

Thanks to Marek Majkowski for additional analysis of this issue.

PR#3191
(cherry picked from commit b77b58a398c8b9b4113f3fb6b48e162a3b8d4527)
update NEWS