what is "initramfs-0-rescue" in F19?

Sat Apr 6 22:37:06 UTC 2013

-rw-------   1 root root  18M 22. Mär 17:06 initramfs-0-rescue-74e76163c28448fba68b8667eb7b5d92.img
-rw-------   1 root root 5,2M  7. Apr 00:34 initramfs-3.9.0-0.rc5.git1.301.fc19.x86_64.img

is this the result of http://fedoraproject.org/wiki/Features/DracutHostOnly
wasting space on virtual machines using hostonly since forever?

[root at rawhide dracut.conf.d]# cat 91-host-only.conf
hostonly="yes"

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