3be318c: upgrade Docker and Linux

• Docker v20.10.14
• Linux v5.10.109
• Tiny Core Linux v12.0
• Parallels Tools v16.5.1-49187
• VMware Tools (open-vm-tools) v11.2.0.23855
• VirtualBox Guest Additions v6.1.32
• XenServer Tools (xe-guest-utilities) v7.20.2

be5929d: new test rebuild with major upgrades

• Docker v20.10.12
• Linux v5.10.101
• Tiny Core Linux v12.0
• Parallels Tools v16.5.1-49187
• VMware Tools (open-vm-tools) v11.2.5.26209
• VirtualBox Guest Additions v6.1.32
• XenServer Tools (xe-guest-utilities) v7.20.2

aee761a : try rebuilding with minor upgrades

• Docker v19.03.15
• Linux v4.19.230
• Tiny Core Linux v11.0
• Parallels Tools v13.3.0-43321
• VMware Tools (open-vm-tools) v11.2.0.23855
• VirtualBox Guest Additions v5.2.44
• XenServer Tools (xe-guest-utilities) v7.18.1

b117afe: Turn off X11 mouse acceleration, for VNC

Workaround for VNC using relative motion, not absolute motion.
PS2 uses relative motion, while USB tablets do absolute motion.

87d35bd

Add the boot2docker logo to the background