SSL_SESSION_SIZE - regression or needed again for R9.0.1FP5HF136 ?

We have just upgraded our backup Domino Server to R9.0.1FP5HF136 and JVM SR16FP20 to do some testing before applying to the production servers

We have started to get SSL_SESSION_SIZE messages in the log when SSL used to access this server.  No crashes, just this supposedly obsolete message.

Searching the Internet and Forums this seems to have been a fix for issues in R6-R8.5.3 but now obsolete in R9.

http://blog.tomcat2000.com/blog/tomcat2000.nsf/dx/domino-9.0.1-a-notes.ini-variable-to-be-removed.htm

I have checked the Server notes.ini file and checked the Server Configuration Document for ini settings and can find no reference to SSL set anywhere.

08/03/2016 12:28:51   New SSL session data length of 103 bytes is larger than the current size of 100 bytes.
08/03/2016 12:28:51   You may want to set the Notes.ini variable SSL_SESSION_SIZE to at least 103 bytes.

Even more confusing, the documents I have found suggest the default should be 5000 bytes, not the 100 we seem to have.

Does anyone have any useful information on this ??

Thanks in advance

Ian