Prep for merge into ::gentoo
From kernel mismatch from critical to warning.
Change hook number from 51 to 52.
Add einfo/ewarn/edebug functions.
Improve runtime logging/display.
Standardize how runtime variables are stored and used.
Add cmdline support for debug and quiet args.
Preparing for plymouth compatibility.
Make the cmdline module builtin.
Full Changelog: 1.9.1...1.10.0