Non-latin character broken on HttpHeader by HttpObjectDecoder.

Motivation:

Currently netty is receiving HTTP request by ByteBuf and store it as "CharSequence" on HttpObjectDecoder. During this operation, all character on ByteBuf is moving to char[] without breaking encoding.
But in process() function, type casting from byte to char does not consider msb (sign-bit). So the value over 127 can be casted wrong value. (ex : 0xec in byte -> 0xffec in char). This is type casting bug.

Modification:

Fix type casting

Result:

Non-latin characters work.

codec-http/src/main/java/io/netty/handler/codec/http/HttpObjectDecoder.java

@@ -805,7 +805,7 @@ public abstract class HttpObjectDecoder extends ByteToMessageDecoder {
 
         @Override
         public boolean process(byte value) throws Exception {
-            char nextByte = (char) value;
+            char nextByte = (char) (value & 0xFF);
             if (nextByte == HttpConstants.CR) {
                 return true;
             }