New in version 0.20
 o  Bug fixes from v1.2beta
 o  An Integrated (inaccurate) ping (/ping <alias>) to determine connection speed
 o  "/set command" to change the command to execute to launch DOOM
 o  "/set alias", "/set name" and "/set email" to change player info
 o  Enforces unique player aliases
 o  Server/Client uses new port [2666]
 o  More robust server
 o  Undocumented Cheat Keys :)
 o  Additional bugs

What's new in v1.2beta?
 o  Chat
 o  Online setting of parameters
 o  Uses Response files
 o  Supports WADfiles
 o  Server logging
 o  Parameter checking on server's side
 o  New client.cfg parameters
 o  New server and client commandline flags and options
 o  Important bug fixes
 o  New bugs
 o  Plus more...

NOTES:
  Version 0.01 and 0.12 clients will not work with v0.20 servers.
  Version 0.20 will not work with DOOM 1.2