updated ZSTD_estimate?DictSize() to pass parameter byReference

resulting ?Dict object is smaller when created byReference.
Seems better than a documentation note.

doc/zstd_manual.html

@@ -412,9 +412,9 @@ size_t ZSTD_estimateDStreamSize(ZSTD_frameHeader fHeader);
          In this case, get additional size by using ZSTD_estimate?DictSize 
 </p></pre><BR>
 
-<pre><b>size_t ZSTD_estimateCDictSize(ZSTD_compressionParameters cParams, size_t dictSize);
-size_t ZSTD_estimateDDictSize(size_t dictSize);
-</b><p>  Note : if dictionary is created "byReference", reduce estimation by dictSize 
+<pre><b>size_t ZSTD_estimateCDictSize(ZSTD_compressionParameters cParams, size_t dictSize, unsigned byReference);
+size_t ZSTD_estimateDDictSize(size_t dictSize, unsigned byReference);
+</b><p>  Note : dictionary created "byReference" are smaller 
 </p></pre><BR>
 
 <a name="Chapter14"></a><h2>Advanced compression functions</h2><pre></pre>
@@ -718,6 +718,21 @@ size_t ZSTD_CDict_loadDictionary(ZSTD_CDict* cdict, const void* dict, size_t dic
 </b><p>  Create a ZSTD_DDict using external alloc and free, optionally by reference 
 </p></pre><BR>
 
+<pre><b>ZSTD_DDict* ZSTD_initStaticDDict(void* workspace, size_t workspaceSize,
+                                 const void* dict, size_t dictSize,
+                                 unsigned byReference);
+</b><p>  Generate a digested dictionary in provided memory area.
+  workspace: The memory area to emplace the dictionary into.
+             Provided pointer must 8-bytes aligned.
+             It must outlive dictionary usage.
+  workspaceSize: Use ZSTD_estimateDDictSize()
+                 to determine how large workspace must be.
+ @return : pointer to ZSTD_DDict*, or NULL if error (size too small)
+  Note : there is no corresponding "free" function.
+         Since workspace was allocated externally, it must be freed externally.
+ 
+</p></pre><BR>
+
 <pre><b>unsigned ZSTD_getDictID_fromDict(const void* dict, size_t dictSize);
 </b><p>  Provides the dictID stored within dictionary.
   if @return == 0, the dictionary is not conformant with Zstandard specification.