Update to 7-Zip Version 21.04

- first test... no release!!!

CPP/7zip/UI/Agent/Agent.h

@@ -234,7 +234,7 @@ public:
   UString ArchiveType;
 
   FStringVector _names;
-  FString _folderPrefix;
+  FString _folderPrefix; // for new files from disk
 
   bool _updatePathPrefix_is_AltFolder;
   UString _updatePathPrefix;
@@ -243,6 +243,8 @@ public:
   UString _archiveFilePath;
   DWORD _attrib;
   bool _isDeviceFile;
+  bool _isHashHandler;
+  FString _hashBaseFolderPrefix;
 
   #ifndef EXTRACT_ONLY
   CObjectVector<UString> m_PropNames;
@@ -258,7 +260,7 @@ public:
     return _attrib != INVALID_FILE_ATTRIBUTES && (_attrib & FILE_ATTRIBUTE_READONLY);
   }
 
-  bool IsThereReadOnlyArc() const
+  bool IsThere_ReadOnlyArc() const
   {
     FOR_VECTOR (i, _archiveLink.Arcs)
     {