Use existing ESCAPE_CHAR instead of magic char.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@798416 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

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

@@ -141,7 +141,7 @@ public static final byte[] encodeUrl(BitSet urlsafe, byte[] bytes) {
                 }
                 buffer.write(b);
             } else {
-                buffer.write('%');
+                buffer.write(ESCAPE_CHAR);
                 char hex1 = Character.toUpperCase(Character.forDigit((b >> 4) & 0xF, RADIX));
                 char hex2 = Character.toUpperCase(Character.forDigit(b & 0xF, RADIX));
                 buffer.write(hex1);
@@ -169,7 +169,7 @@ public static final byte[] decodeUrl(byte[] bytes) throws DecoderException {
             int b = bytes[i];
             if (b == '+') {
                 buffer.write(' ');
-            } else if (b == '%') {
+            } else if (b == ESCAPE_CHAR) {
                 try {
                     int u = Utils.digit16(bytes[++i]);
                     int l = Utils.digit16(bytes[++i]);