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/Compress/Rar5Decoder.cpp

@@ -196,6 +196,8 @@ HRESULT CDecoder::ExecuteFilter(const CFilter &f)
 
     default:
       _unsupportedFilter = true;
+      memset(_filterSrc, 0, f.Size);
+      // return S_OK;  // unrar
   }
 
   return WriteData(useDest ?
@@ -301,7 +303,11 @@ HRESULT CDecoder::AddFilter(CBitDecoder &_bitStream)
   UInt32 blockStart = ReadUInt32(_bitStream);
   f.Size = ReadUInt32(_bitStream);
 
-  // if (f.Size > ((UInt32)1 << 16)) _unsupportedFilter = true;
+  if (f.Size > ((UInt32)1 << 22))
+  {
+    _unsupportedFilter = true;
+    f.Size = 0;  // unrar 5.5.5
+  }
 
   f.Type = (Byte)_bitStream.ReadBits9fix(3);
   f.Channels = 0;