Add Config to allow servers to re-enable support for client-side 'hacks' like Staff Of Traveling Keybind mod. (#142)

* Update Config.java

Adding config to allow not validating travel staff packets.

* Update TravelController.java

Disable validation if server config deems it so.

* spotlessApply fix

* Wrong ordering and spotlessApply

src/main/java/crazypants/enderio/config/Config.java

@@ -161,6 +161,7 @@ public final class Config {
     public static String[] travelStaffBlinkBlackList = new String[] { "minecraft:bedrock", "Thaumcraft:blockWarded" };
     public static float travelAnchorZoomScale = 0.2f;
     public static boolean travelStaffSearchOptimize = true;
+    public static boolean validateTravelEventServerside = true;
 
     /** The max distance for travelling to a Travel Anchor. */
     public static int teleportStaffMaxDistance = 2048;
@@ -1214,6 +1215,13 @@ public final class Config {
                         + "This config is experimental, so if you encounter any strange behavior, please report to GTNH developer.")
                 .getBoolean(travelStaffSearchOptimize);
 
+        validateTravelEventServerside = config.get(
+                sectionStaff.name,
+                "validateTravelEventServerside",
+                validateTravelEventServerside,
+                "If set to true: Server will validate if player actually can teleport. False will allow hacking, but also allows Staff of Traveling Keybind mod to work.")
+                .getBoolean(validateTravelEventServerside);
+
         teleportStaffMaxDistance = config
                 .get(
                         sectionStaff.name,

src/main/java/crazypants/enderio/teleport/TravelController.java

@@ -124,6 +124,10 @@ public class TravelController {
      */
     public String validatePacketTravelEvent(EntityPlayerMP toTp, int x, int y, int z, int powerUse,
             boolean conserveMotion, TravelSource source) {
+
+        // If config indicates to allow for 'hacking' the travel packet, then don't do any validation.
+        if (!Config.validateTravelEventServerside) return null;
+
         BlockCoord target = new BlockCoord(x, y, z);
         double dist = getDistanceSquared(toTp, target);
         // allow 15% overshoot to account for rounding