Don't always force to lower case in deprecated method

Author: markt-asf

java/org/apache/coyote/http2/HPackHuffman.java

@@ -443,7 +443,11 @@ public static void decode(ByteBuffer data, int length, StringBuilder target) thr
      */
     @Deprecated
     public static boolean encode(ByteBuffer buffer, String toEncode, boolean forceLowercase) {
-        return encode(buffer, toEncode.toLowerCase(Locale.ENGLISH));
+        if (forceLowercase) {
+            return encode(buffer, toEncode.toLowerCase(Locale.ENGLISH));
+        } else {
+            return encode(buffer, toEncode);
+        }
     }