Qualys (ssl labs) results question

[AJ Weber]

Looking through the results for my server, I noticed these two lines in 
the "Protocol Details" section:

     Session resumption (caching)    No (IDs assigned but not accepted)
     Session resumption (tickets)    No   INTOLERANT

Should I change my config to alter these two results (for performance OR 
security)?  If so, can anyone identify what config options I should 
add/change?

Also, is there a way to force the "Server hostname" to be a specific 
FQDN (that we use for this server and website)?  It seems to return my 
hosting provider's original hostname of the server, even though we use 
our registered host/domain for the site.  (And "hostname" cmd in bash 
returns the FQDN we want -- I don't know where ngnix is getting this value.)

This is nginx 1.7.6 on CentOS 6.x.

Thanks in advance!
-AJ