Home Assistant OS Release-6 build 0 (RC3)

Changes

Home Assistant Operating System

• Pass ha command with quotes to CLI container (#1377) @agners
• Add minimal message of the day (#1373) @agners

Open Virtual Appliance

• Update Barebox to 2021.05.0 (#1380) @agners
• Enable serial console as well (#1339) (#1378) @agners
• Drop directories when creating zip file (#1372) @agners

Generic x86-64

• Update Barebox to 2021.05.0 (#1380) @agners

Hardkernel ODROID

• Keep Linux patches for 5.10.37 for other ODROID boards (#1381) @agners
• Revert ODROID-N2(+) back to use Linux 5.9 (#1379) @agners