Alfheim

Innovations:
 Domains can now be accessed only with it's entrance or via /tpdim command
 Disabled nether portal creation in Niflheim
 Thrym and Surtr now cannot have potions on them

Fixes:
 Event banner popup persistence
 Manaflame crash
 Sun Slash attack area
 Fenrir Storm attack area (hopefully)
 Thrym and Surtr quick shield destruction
 Thrym second stage logic
 Harp render distance
 Redstone rod-related features crash in multiplayer