- regular.mk: add btrfs support for jeos-full (Closes: 46212)
- grub: add missing info messages about bootloading of kernel, initrd and other
- stage2: save cpe from /etc/os-release to .disk/cpe (Closes: 46271)
- reports: DEBUG must be enabled, CHECK must be disabled
- reports.mk: allow read access to the report to everyone
- plymouth: add kernel cmdline parameter 'loglevel=3' after 'quiet'
- base+regular: add apt-https
- plymouth: add feature plymouth to initrd.mk for rootfs
- Add latests commits from zerg@ and cas@

loglevel=3 will remove warnings about ACPI errors and processor
vulnerabilities. These messages break silent boot and scare users.
However, we cannot correct these errors.
'loglevel=3' must be after 'quiet'. Otherwise, errors are shown.