Bump Netty version - it contains a fix for an issue some users have seen.

CraftBukkit-Patches/0021-Netty.patch

@@ -1,4 +1,4 @@
-From 75205d26eaaad90fd58d0a1b317176d59689658e Mon Sep 17 00:00:00 2001
+From 3f4c6866021b6be78d1e74707730b18a0323bbe2 Mon Sep 17 00:00:00 2001
 From: md_5 <md_5@live.com.au>
 Date: Tue, 23 Apr 2013 11:47:32 +1000
 Subject: [PATCH] Netty
@@ -32,7 +32,7 @@ Subject: [PATCH] Netty
  Commons Attribution-ShareAlike 3.0 Unported license.
 
 diff --git a/pom.xml b/pom.xml
-index 274fd43..4022004 100644
+index 274fd43..665dc9f 100644
 --- a/pom.xml
 +++ b/pom.xml
 @@ -132,6 +132,16 @@
@@ -42,7 +42,7 @@ index 274fd43..4022004 100644
 +    <dependency>
 +      <groupId>io.netty</groupId>
 +      <artifactId>netty-all</artifactId>
-+      <version>4.0.0.CR3</version>
++      <version>4.0.0.Final-SNAPSHOT</version>
 +    </dependency>
 +    <dependency>
 +        <groupId>org.javassist</groupId>