Update to 7-Zip 17.01 Beta from Igor Pavlov

- Minor speed optimization for LZMA2 (xz and 7z) multi-threading compression.
  7-Zip now uses additional memory buffers for multi-block LZMA2 compression.
  CPU utilization was slightly improved.
- 7-zip now creates multi-block xz archives by default. Block size can be
  specified with -ms[Size]{m|g} switch.
- xz decoder now can unpack random block from multi-block xz archives.  7-Zip
  File Manager now can open nested multi-block xz archives (for example,
  image.iso.xz) without full unpacking of xz archive.
- 7-Zip now can create zip archives from stdin to stdout.
- 7-Zip command line: @listfile now doesn't work after -- switch.  Use
  -i@listfile before -- switch instead.

fixed bugs:
- 7-Zip could add unrequired alternate file streams to WIM archives, for
  commands that contain filename wildcards and -sns switch.
- 7-Zip 17.00 beta crashed for commands that write anti-item to 7z archive.
- 7-Zip 17.00 beta ignored "Use large memory pages" option.

CPP/7zip/Archive/Zip/ZipAddCommon.h

@@ -26,7 +26,7 @@ struct CCompressingResult
   UInt32 CRC;
   UInt16 Method;
   Byte ExtractVersion;
-  bool FileTimeWasUsed;
+  bool DescriptorMode;
   bool LzmaEos;
 };
 
@@ -53,12 +53,14 @@ public:
   CAddCommon(const CCompressionMethodMode &options);
   ~CAddCommon();
 
-  HRESULT Set_Pre_CompressionResult(bool seqMode, UInt64 unpackSize, CCompressingResult &opRes) const;
+  HRESULT Set_Pre_CompressionResult(bool inSeqMode, bool outSeqMode, UInt64 unpackSize,
+      CCompressingResult &opRes) const;
   
   HRESULT Compress(
       DECL_EXTERNAL_CODECS_LOC_VARS
       ISequentialInStream *inStream, IOutStream *outStream,
-      bool seqMode, UInt32 fileTime,
+      bool inSeqMode, bool outSeqMode,
+      UInt32 fileTime, UInt64 expectedDataSize,
       ICompressProgressInfo *progress, CCompressingResult &opRes);
 };