Add @SInCE 1.7.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1380822 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/main/java/org/apache/commons/codec/digest/DigestUtils.java

@@ -97,6 +97,7 @@ public static MessageDigest getDigest(String algorithm) {
      *             when a {@link NoSuchAlgorithmException} is caught, which should never happen because MD2 is a
      *             built-in algorithm
      * @see MessageDigestAlgorithms#MD2
+     * @since 1.7
      */
     public static MessageDigest getMd2Digest() {
         return getDigest(MessageDigestAlgorithms.MD2);