create random seeds for features using SecureRandom

patches/server/0800-Configurable-feature-seeds.patch

@@ -19,7 +19,7 @@ index 7d44abcb4fff9717a1af55879deb7eb9c2d9e7e9..e29b0a90019b12bd6586ad0f7b5314f3
              }
              final Object val = config.get(key);
 diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
-index fd7ac4be153538dcee60fade6e7a00f57770e97f..9a3f75288b1d743a7ec4bfd663c1c2988678d3e6 100644
+index fd7ac4be153538dcee60fade6e7a00f57770e97f..beab9b5701a32a34bcb739920ff3c0106ede7530 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
 @@ -927,6 +927,55 @@ public class PaperWorldConfig {
@@ -43,7 +43,7 @@ index fd7ac4be153538dcee60fade6e7a00f57770e97f..9a3f75288b1d743a7ec4bfd663c1c298
 +
 +        if (randomise) {
 +            final Map<String, Object> randomisedSeeds = new HashMap<>();
-+            final java.util.Random random = new java.util.Random();
++            final java.util.Random random = new java.security.SecureRandom();
 +            for (final net.minecraft.resources.ResourceLocation resourceLocation : registry.keySet()) {
 +                if (featureSeeds.containsKey(resourceLocation)) {
 +                    continue;