Update links
Use ACR's demo constants
Add support with ACR's master-server client-side
Use port 28770 as default
Use port 28778 for LAN socket
256 clients, 12 by default
Add ACR's license declaration
Add ACR icon for Windows
Display the character for packet logs
Fix registry tool
AC -> ACR in some messages
maxfps 0 by default
Some geometry backports