Convert /boot/initr{amfs,d} per Debian conventions

Antonio Russorequested to merge
aerusso/dracut:mrs/initrd-no-initramfs into master

Every third time I need to rebuild a dracut image, I forget this bit of trivia, and wind up spending 10 minutes tracking down why something isn't showing up on my ramdisk, when it turns out I'm just not looking in the right (wrong) place.

Patch occurrences of /boot/initramfs to /boot/initrd, so that default output image name matches Debian convention.

Reduces administrator headaches when regenerating dracut images. No longer must the output filename /boot/initrd.img- be specified when manually running dracut.

Tested locally.

Merge request reports