Merge branch 'netty5' into 1.0

# Conflicts:
#	multipart-core/src/main/java/io/netty/contrib/multipart/AbstractDecoder.java

Author: yawkat

multipart-core/src/main/java/io/netty/contrib/multipart/AbstractDecoder.java

@@ -45,7 +45,7 @@ public void add(ByteBuf buffer) {
             }
             if (this.buffer.readableBytes() > undecodedLimit) {
                 buffer.release();
-                throw new FormDecoderException("Undecoded data limit exceeded");
+                throw new UndecodedDataLimitExceededException();
             }
 
             if (this.buffer instanceof CompositeByteBuf) {

multipart-core/src/main/java/io/netty/contrib/multipart/UndecodedDataLimitExceededException.java

@@ -0,0 +1,10 @@
+package io.netty.contrib.multipart;
+
+/**
+ * Exception when the maximum data buffer size is reached, e.g. when a form field name is too long for the buffer
+ */
+public class UndecodedDataLimitExceededException extends FormDecoderException {
+    public UndecodedDataLimitExceededException() {
+        super("Undecoded data limit exceeded");
+    }
+}