* feature: Added ability to switch port polling mode
* update, speed things up slightly by walking certain tables
* more fixes
* updates
* updates
* update to exclude ports that are down
* wrong variable used
* update to set previous port status when null
* small update to port disco
Clarified that the mysqld performance options need to be put under a [mysqld] group in my.cnf. Since in Ubuntu 16.04 /etc/mysql/my.cnf only has [client-server] group by default which is not a valid group for the changes we make.