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/UI/Common/ArchiveExtractCallback.cpp

@@ -988,7 +988,7 @@ if (askExtractMode == NArchive::NExtract::NAskMode::kExtract && !_testMode)
         || !pathParts.IsEmpty()
         || !(_removePartsForAltStreams || _pathMode == NExtract::NPathMode::kNoPathsAlt))
     #endif
-      Correct_FsPath(_pathMode == NExtract::NPathMode::kAbsPaths, pathParts, _item.MainIsDir);
+      Correct_FsPath(_pathMode == NExtract::NPathMode::kAbsPaths, _keepAndReplaceEmptyDirPrefixes, pathParts, _item.MainIsDir);
 
     #ifdef SUPPORT_ALT_STREAMS
     
@@ -1542,7 +1542,7 @@ STDMETHODIMP CArchiveExtractCallback::SetOperationResult(Int32 opRes)
     NumFiles++;
 
   if (!_stdOutMode && _extractMode && _fi.AttribDefined)
-    SetFileAttrib(_diskFilePath, _fi.Attrib);
+    SetFileAttrib_PosixHighDetect(_diskFilePath, _fi.Attrib);
   
   RINOK(_extractCallback2->SetOperationResult(opRes, BoolToInt(_encrypted)));