Merge server stuff from alfadur

HedgeEditor: Show waypoint preview

HedgeEditor: Fix sndIncoming playing for placing stuff, add many sound effects

HedgeEditor: Clean up messy HWP overwrites - Remove all sounds - Move sticky mine, mine and dud mine images to custom sprites - Move crate preview outline to custom sprite

Racer: No longer play Incoming or Missed sound

Construction Mode: Fix annoying Incoming voice and other sound issues

Lua API: PlaySound: Add 3rd parameter instaVoice to instantly play voice

Lua API: Add SetSoundMask to disable playing certain sounds

ACF2: Make all Weaklings on worst CPU level

separated the server logic from all the async io mess.

ACF: Reduce computer hog levels in missions 2 and 6. They were way too high, especially in mission 2. Mission 2: Weaklings: level 5 → level 1 (except Brainiac) Stronglings: (real) level 4 → level 2 Brainiac: level 1 → level 5 (because he's special) Looks like all levels were just flipped. Mission 5: First enemy team: level 5 → level 3 Reinforcements: level 5 → level 4 The high skill level punishes player mistakes too much.

CTF_Blizzard: Force clan limit of 2. Auto-remove excess hogs

CTF_Blizzard: Dump dead code / out-commented code

CTF: Write hog with most captures in stats screen

CTF: Say "clan" instead of "team" in mission panel