Identified all of the private IP addresses
Identified all of the private IP addresses

Converted indexOf matchings to a single regular expression and added support for 172.16 - 31.x.x.
Acidburn0zzz/webrtc-ips,privacytoolsIO/webrtc-ips,ceceprawiro/webrtc-ips,xros/webrtc-ips,cornips/getLocalIP,cryptostorm/STUNnion,cornips/getLocalIP,pythonvietnam/webrtc-ips,diafygi/webrtc-ips,bitemyapp/webrtc-ips,lioonline/webrtc-ips,kisflying/webrtc-ips,viqtus/webrtc-ips,cryptostorm/STUNnion,fu3kingt3pe/webrtc-ips,dxa4481/webrtc-ips,smokeelow/webrtc-ips,eyecatchup/webrtc-ips,goliate/WebRTC-ip