Fix Clirr issues. The next major release may break compatibility and make the changed fields final.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@794341 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/java/org/apache/commons/codec/net/URLCodec.java

@@ -51,11 +51,15 @@
 public class URLCodec implements BinaryEncoder, BinaryDecoder, StringEncoder, StringDecoder {
 
     /**
-     * The default charset used for string decoding and encoding.
+     * The default charset used for string decoding and encoding. Consider this field final. The next major release may
+     * break compatibility and make this field be final.
      */
-    protected final String charset;
+    protected String charset;
 
-    protected static final byte ESCAPE_CHAR = '%';
+    /**
+     * Consider this field final. The next major release may break compatibility and make this field be final.
+     */
+    protected static byte ESCAPE_CHAR = '%';
     /**
      * BitSet of www-form-url safe characters.
      */