PS3 proxy to allow PSN login on older firmwares

• To detect the local IP and use the default port, run the binary with no arguments, and it will show your current local IP where you should point your PS3.
• To set a local IP and port, run the binary as ps3-proxy IP PORT. For example, ps3-proxy 192.168.1.1 12000.
• On your PS3 select Settings ➡ Network Settings ➡ Internet Connection Settings, press ✖ to continue, select Custom method and continue until you get the Proxy Server screen. Choose Use, continue, enter the IP address you got from the previous step and continue until you reach the save settings page. press ✖ to save settings and press it again if you want to to test the connection. You should now be able to connect to PSN.

@elazarl for his goproxy library and examples. Without it this script would not be possible.