Add option to allow iron golems to spawn in air

docs/source/configuration.rst

@@ -178,7 +178,10 @@ mobs
 * iron_golem
     * swims
         - **default**: true
-        - **description**: Set whether iron golem can swim or not
+        - **description**: Set whether iron golems can swim or not
+    * can-spawn-in-air
+        - **default**: false
+        - **description**: Set whether iron golems can spawn in the air, like in 1.12 and below
 
 * phantom
     * crystals-attack-range

patches/server/0076-Add-option-to-allow-iron-golems-to-spawn-in-air.patch

@@ -0,0 +1,41 @@
+From 460df69e28a020627023231fc8f3f38789effe79 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <blake.galbreath@gmail.com>
+Date: Sat, 19 Oct 2019 02:20:45 -0500
+Subject: [PATCH] Add option to allow iron golems to spawn in air
+
+---
+ src/main/java/net/minecraft/server/EntityIronGolem.java | 2 +-
+ src/main/java/net/pl3x/purpur/PurpurConfig.java         | 2 ++
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/src/main/java/net/minecraft/server/EntityIronGolem.java b/src/main/java/net/minecraft/server/EntityIronGolem.java
+index 9bb033336c..6fdc4e6d6a 100644
+--- a/src/main/java/net/minecraft/server/EntityIronGolem.java
++++ b/src/main/java/net/minecraft/server/EntityIronGolem.java
+@@ -169,7 +169,7 @@ public class EntityIronGolem extends EntityGolem {
+         BlockPosition blockposition1 = blockposition.down();
+         IBlockData iblockdata = iworldreader.getType(blockposition1);
+ 
+-        if (!iblockdata.a((IBlockAccess) iworldreader, blockposition1, (Entity) this)) {
++        if (!iblockdata.a((IBlockAccess) iworldreader, blockposition1, (Entity) this) && !net.pl3x.purpur.PurpurConfig.ironGolemsCanSpawnInAir) { // Purpur
+             return false;
+         } else {
+             for (int i = 1; i < 3; ++i) {
+diff --git a/src/main/java/net/pl3x/purpur/PurpurConfig.java b/src/main/java/net/pl3x/purpur/PurpurConfig.java
+index a8d86b4345..a98e704cff 100644
+--- a/src/main/java/net/pl3x/purpur/PurpurConfig.java
++++ b/src/main/java/net/pl3x/purpur/PurpurConfig.java
+@@ -241,8 +241,10 @@ public class PurpurConfig {
+     }
+ 
+     public static boolean ironGolemSwims = true;
++    public static boolean ironGolemsCanSpawnInAir = false;
+     private static void ironGolemSettings() {
+         ironGolemSwims = getBoolean("settings.mobs.iron_golem.swims", ironGolemSwims);
++        ironGolemsCanSpawnInAir = getBoolean("settings.mobs.iron_golem.can-spawn-in-air", ironGolemsCanSpawnInAir);
+     }
+ 
+     public static double crystalsAttackPhantomsRadius = 0.0D;
+-- 
+2.23.0.rc1
+