ea2y-3

I'm kind of embarrassed to ask this but I still can't figure out what to do in the config file. I've located the file but I'm not sure if I should be adjusting all of the info or just lines 1 and 2. I'm not even sure what to put in 3. Can someone break down what I should be adjusting and to what? Also, do I just copy paste everything at the bottom of the page? Thank you in advance and I'm sorry if this is an annoying question. 'trusted_domains' => array ( 0 => 'localhost', 1 => 'server1.example.com', 2 => '192.168.1.50', 3 => '[fe80::1:50]', ),