On Windows, named data streams are now correctly extracted to existing
"readonly" directories. Before, an error would be reported.
+ On Windows, it is now possible to do a "WIMBoot mode" extraction with
+ non-standalone WIMs such as delta WIMs.
+
On Windows, when doing an extraction in "WIMBoot mode", files larger
than 4 gigabytes are now never extracted as externally backed. This
works around a bug in Microsoft's "WOF" driver.