Added support for varying log levels configurable in the server config (see log_level in default.conf)

Error logs now properly print to stderr when possible
Colour-coded logs
Addressed a scenario in which outgoing packet writes could get hung up
Fixed interface incorrect definition message on server startup

Server/src/main/core/ServerConstants.kt

@@ -2,6 +2,7 @@ package core
 
 import core.game.system.SystemShutdownHook
 import core.game.world.map.Location
+import core.tools.LogLevel
 import core.tools.mysql.Database
 import core.tools.secondsToTicks
 import java.math.BigInteger
@@ -160,6 +161,12 @@ class ServerConstants {
 		@JvmField
 		var I_AM_A_CHEATER = false
 
+		@JvmField
+		var LOG_LEVEL = LogLevel.VERBOSE
+
+		@JvmField
+		var JAVA_VERSION = 8
+
 		//location names for the ::to command.
 		val TELEPORT_DESTINATIONS = arrayOf(
 			arrayOf(Location.create(2974, 4383, 2), "corp", "corporal", "corporeal"),