Changes:
- Blockheads Ruin Xmas game mode added. Gather presents and jump into the fire pit to destroy them. Build by Sumz & Hamburger, code by Zor. (Note: I tweaked and reformatted the code, so problems may not necessarily be his fault)
- Removed $Pref::Steam::DisableSteam, replaced with -nosteam command line option
- Improved error messages for authentication dns/connection failures
- Vehicle steering options moved from "advanced" to "controls"