Magic system: Moved m_bExpGainAmount & m_bMaxWeightAmount into the CUser class.
Magic system: Removed CUser::Type3AreaDuration() as it's completely unused here (and officially).
AI server: Removed NpcTable.cpp
AI server: Removed light (not lightning) resistance as it's completely unused.
Game server: Removed the UDP socket system (if required, we can implement a neater system -- as is, it's completely useless).
Game server: Cleaned up some duplicate resistance logic in Unit::GetACDamage().
Magic system: Fixed/implemented a few player checks to prevent player-specific code from crashing if using an NPC.
Magic system: Replaced a few player/NPC ID checks with slightly faster, more readable and less error prone flag checks.