Update nginx ssl-conf

doc/install/Production-Debian.md

@@ -269,6 +269,7 @@ exit 0
         ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
         ssl_ciphers "HIGH:!aNULL:!MD5 or HIGH:!aNULL:!MD5:!3DES";
         ssl_prefer_server_ciphers on;
+        ssl_session_cache shared:SSL:10m;
 
 		# add to location / above
 		location / {

doc/install/Production-Ubuntu.md

@@ -164,6 +164,7 @@ exec bin/platform
         ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
         ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
         ssl_prefer_server_ciphers on;
+        ssl_session_cache shared:SSL:10m;
 
 		# add to location / above
 		location / {