Add per-arena setting auto-ignite-fuse.

This new setting allows changing the fuse time for auto-ignited TNT,
which is normally a hardcoded 80 ticks in Minecraft. Note the somewhat
weak safeguarding without any sort of error message - with great power
comes great responsibility...

Closes #715

src/main/java/com/garbagemule/MobArena/ArenaListener.java

@@ -123,6 +123,7 @@ public class ArenaListener
     private boolean allowTeleport,
             canShare,
             autoIgniteTNT;
+    private int autoIgniteFuse;
 
     private Set<Player> banned;
 
@@ -146,6 +147,7 @@ public class ArenaListener
         this.allowTeleport    = s.getBoolean("allow-teleporting",    false);
         this.canShare         = s.getBoolean("share-items-in-arena", true);
         this.autoIgniteTNT    = s.getBoolean("auto-ignite-tnt",      false);
+        this.autoIgniteFuse   = s.getInt("auto-ignite-fuse",         80);
         this.useClassChests   = s.getBoolean("use-class-chests",     false);
 
         this.classLimits = arena.getClassLimitManager();
@@ -284,6 +286,7 @@ public class ArenaListener
                 stack.setAmount(stack.getAmount() - 1);
                 TNTPrimed tnt = b.getWorld().spawn(b.getRelative(BlockFace.UP).getLocation(), TNTPrimed.class);
                 tnt.setSource(event.getPlayer());
+                tnt.setFuseTicks(Math.max(0, autoIgniteFuse));
                 return;
             }
         }

src/main/resources/res/settings.yml

@@ -33,6 +33,7 @@ food-regen: false
 lock-food-level: true
 player-time-in-arena: world
 auto-ignite-tnt: false
+auto-ignite-fuse: 80
 auto-start-timer: 0
 start-delay-timer: 0
 auto-ready: false