Swap out always-OP vanilla system for Bukkit OP checking in command blocks

nms-patches/PlayerConnection.patch

@@ -1,5 +1,5 @@
---- ../work/decompile-8eb82bde//net/minecraft/server/PlayerConnection.java	2014-12-09 12:20:29.531617451 +0000
-+++ src/main/java/net/minecraft/server/PlayerConnection.java	2014-12-09 12:20:21.823617622 +0000
+--- ../work/decompile-8eb82bde//net/minecraft/server/PlayerConnection.java	Mon Dec 15 10:02:18 2014
++++ src/main/java/net/minecraft/server/PlayerConnection.java	Mon Dec 15 10:02:18 2014
 @@ -16,6 +16,48 @@
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
@@ -1420,7 +1420,7 @@
                  return;
              } finally {
                  packetdataserializer.release();
-@@ -946,6 +1896,7 @@
+@@ -946,11 +1896,12 @@
                  }
              } catch (Exception exception2) {
                  PlayerConnection.c.error("Couldn\'t select trade", exception2);
@@ -1428,6 +1428,12 @@
              }
          } else if ("MC|AdvCdm".equals(packetplayincustompayload.a())) {
              if (!this.minecraftServer.getEnableCommandBlock()) {
+                 this.player.sendMessage(new ChatMessage("advMode.notEnabled", new Object[0]));
+-            } else if (this.player.a(2, "") && this.player.abilities.canInstantlyBuild) {
++            } else if (this.player.getBukkitEntity().isOp() && this.player.abilities.canInstantlyBuild) { // CraftBukkit - Change to Bukkit OP versus Vanilla OP
+                 packetdataserializer = packetplayincustompayload.b();
+ 
+                 try {
 @@ -986,6 +1937,7 @@
                      }
                  } catch (Exception exception3) {