VirtualBox 6.0.6 for PC Windows

This is a maintenance release. The following items were fixed and/or added:

Virtualization core: nested AMD virtualization fixes
User interface: fixed copying directories in file manager
User interface: fixed operation progress in file manager when copying content
User interface: fixed operation progress when deleting snapshots
User interface: fixed unattended installation of recent Ubuntu guests
User interface: various additional improvements
Storage: fixed loading saved states for LsiLogic devices (6.0.0 regression; bug #18263)
Storage: fixed fixed reading certain QCOW2 images and support version 3 of the format readonly
Storage: Improved IDE PCI emulation to allow NetWare IDE drivers to use bus-mastering
Graphics: Improved VMSVGA support to work with old X servers which previously showed only a badly scrambled screen
Graphics: fixed invisible mouse cursor with VMSVGA emulation and without mouse integration (bug #18239)
Graphics: make EFI work with VMSVGA emulation (bug #18282)
Graphics: remember last guest screen size VMSVGA emulation
Graphics: fix RDP to guests using VMSVGA emulation
Graphics: various additional VMSVGA emulation fixes
Audio: implemented audio device enumeration for the DirectSound backend
Network: fixed unwanted padding bytes in Windows host adaptor network packets (bug #18202 and bug #18355)
Serial: fixed possible crash on Windows when using a host device (6.0.0 regression; bug #18319)
Serial: fixed loopback handling in the emulation causing garbage to be sent during boot with Linux guests (6.0.0 regression; bug #18319)
Shared folders: fixed duplicate folders after restoring a saved state (bug #18373 and other)
Drag and drop: fixed copying files from guest host (bug #18305)
Recording: fixed modifying settings via VBoxManage (bug #18494)
VBoxManage: crash fix (bug #18341)
Fixed hangs during failed virtual machine start-up
Windows host: fix unwanted wake-ups from standby (bug #18549)
Windows host: disallow Pause as a host key (bug #18482)
Linux host and guest: support Linux 5.0 and 5.1, thank you Valdis Kletnieks (see also bug #18515)
Linux host: support kernel 4.4.169 (bug #18315)
Linux host: fix logging when building Linux kernel modules (bug #18226)
Linux host: clarified building Linux host drivers with secure boot (bug #18312)
FreeBSD host: compilation fixes
Installers: reduced size of packages
Web services: work with Java 11
LibreSSL compilation fix, thank you Stefan Strogin
Windows guests: fixed running applications which use complex display topologies with WDDM driver, fixed Skype for Business hangs (bug #17092)
Windows guests: fixed an occasional guest crash with WDDM driver and VBoxSVGA adapter (bug #18369)
Windows guests: shared folder file creation detection issue (bug #9276)
Linux guests: shared folder performance and reliability improvements and missing features (bugs #17360, #819)
OS/2 guests: shared folder fixes (bug #18376 and bug #18379)