updated ZSTD_DCtx_reset()

signature and behavior is now the same as ZSTD_CCtx_reset()

doc/zstd_manual.html

@@ -609,12 +609,12 @@ size_t ZSTD_sizeof_DDict(const ZSTD_DDict* ddict);
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 <pre><b>typedef enum {
-    ZSTD_CCtx_reset_session_only = 1,
-    ZSTD_CCtx_reset_parameters = 2,
-    ZSTD_CCtx_reset_session_and_parameters = 3
-} ZSTD_CCtx_reset_directive;
+    ZSTD_reset_session_only = 1,
+    ZSTD_reset_parameters = 2,
+    ZSTD_reset_session_and_parameters = 3
+} ZSTD_reset_directive;
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-<pre><b>size_t ZSTD_CCtx_reset(ZSTD_CCtx* cctx, ZSTD_CCtx_reset_directive zcrd);
+<pre><b>size_t ZSTD_CCtx_reset(ZSTD_CCtx* cctx, ZSTD_reset_directive reset);
 </b><p>  There are 2 different things that can be reset, independently or jointly :
   - The session : will stop compressing current frame, and make CCtx ready to start a new one.
                   Useful after an error, or to interrupt any ongoing compression.
@@ -734,12 +734,11 @@ size_t ZSTD_sizeof_DDict(const ZSTD_DDict* ddict);
  
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-<pre><b>void ZSTD_DCtx_reset(ZSTD_DCtx* dctx);     </b>/* <==== There is a discrepancy with ZSTD_CCtx_reset(): here it necessarily resets everything (context and parameters) */<b>
+<pre><b>size_t ZSTD_DCtx_reset(ZSTD_DCtx* dctx, ZSTD_reset_directive reset);
 </b><p>  Return a DCtx to clean state.
-  If a decompression was ongoing, any internal data not yet flushed is cancelled.
-  All parameters are back to default values, including sticky ones.
-  Dictionary (if any) is dropped.
-  Parameters can be modified again after a reset.
+  Session and parameters can be reset jointly or separately
+  Parameters can only be reset when no active frame is being decompressed.
+ @return : 0, or an error code, which can be tested with ZSTD_isError()
  
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