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diff --git a/subversion/include/svn_md5.h b/subversion/include/svn_md5.h
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+/**
+ * @copyright
+ * ====================================================================
+ *    Licensed to the Apache Software Foundation (ASF) under one
+ *    or more contributor license agreements.  See the NOTICE file
+ *    distributed with this work for additional information
+ *    regarding copyright ownership.  The ASF licenses this file
+ *    to you under the Apache License, Version 2.0 (the
+ *    "License"); you may not use this file except in compliance
+ *    with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing,
+ *    software distributed under the License is distributed on an
+ *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *    KIND, either express or implied.  See the License for the
+ *    specific language governing permissions and limitations
+ *    under the License.
+ * ====================================================================
+ * @endcopyright
+ *
+ * @file svn_md5.h
+ * @brief Converting and comparing MD5 checksums.
+ */
+
+#ifndef SVN_MD5_H
+#define SVN_MD5_H
+
+#include <apr_pools.h>  /* for apr_pool_t */
+
+#include "svn_types.h"  /* for svn_boolean_t */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+
+/**
+ * The MD5 digest for the empty string.
+ *
+ * @deprecated Provided for backward compatibility with the 1.5 API.
+ * */
+SVN_DEPRECATED
+const unsigned char *
+svn_md5_empty_string_digest(void);
+
+
+/**
+ * Return the hex representation of @a digest, which must be
+ * @c APR_MD5_DIGESTSIZE bytes long, allocating the string in @a pool.
+ *
+ * @deprecated Provided for backward compatibility with the 1.5 API.
+ */
+SVN_DEPRECATED
+const char *
+svn_md5_digest_to_cstring_display(const unsigned char digest[],
+                                  apr_pool_t *pool);
+
+
+/**
+ * Return the hex representation of @a digest, which must be
+ * @c APR_MD5_DIGESTSIZE bytes long, allocating the string in @a pool.
+ * If @a digest is all zeros, then return NULL.
+ *
+ * @deprecated Provided for backward compatibility with the 1.5 API.
+ */
+SVN_DEPRECATED
+const char *
+svn_md5_digest_to_cstring(const unsigned char digest[],
+                          apr_pool_t *pool);
+
+
+/**
+ * Compare digests @a d1 and @a d2, each @c APR_MD5_DIGESTSIZE bytes long.
+ * If neither is all zeros, and they do not match, then return FALSE;
+ * else return TRUE.
+ *
+ * @deprecated Provided for backward compatibility with the 1.5 API.
+ */
+SVN_DEPRECATED
+svn_boolean_t
+svn_md5_digests_match(const unsigned char d1[],
+                      const unsigned char d2[]);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* SVN_MD5_H */