Take 'listen_port' from 'farmview' section

'listen_port' config key is in 'farmview' section, not in 'settings'.
Direct broadcast fix

Fix: use const SOCK_DGRAM instead of string 'SOCK_DGRAM'
Merge branch 'direct-boadcast-fix'
Merge branch 'refs/heads/listen-port-fix'
Merge remote-tracking branch 'upstream/master'
Removed reference to `farmview`

Obsolete ref to farmview in installation script
Merge pull request #61 from The-Smallest/install-no-farmview-fix

Install no farmview fix