[CODEC-211] Create enum MessageDigestAlgorithm and deprecate class MessageDigestAlgorithms. Javadoc.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1743946 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/main/java/org/apache/commons/codec/digest/Sha2Crypt.java

@@ -128,7 +128,7 @@ public static String sha256Crypt(final byte[] keyBytes, String salt) {
      *             if the given salt is <code>null</code> or does not match the allowed pattern
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught
-     * @see MessageDigestAlgorithms
+     * @see MessageDigestAlgorithm
      */
     private static String sha2Crypt(final byte[] keyBytes, final String salt, final String saltPrefix,
             final int blocksize, final String algorithm) {