- Bundle `archzfs` as a DKMS module.
- Enable serial console for all boot options, including Memtest86+.
- Add EFI boot progress indicators for kernel/initramfs/system stages.
- Print headers and done vs. skipped indicators for each build step.
- Polish `issue(5)`.
Fixes#9.
Adds empty sysresccd_custom.cfg and /boot/grub/custom.cfg files that
are included from the regular boot menus (syslinux and grub). These
are intended for the user to customize.
Having dedicated files for this allows completely replacing the files.
This is easier than requiring careful patching with potential conflicts
with different versions of SystemRescue.