boot images.
The difference compared to the boot images is that these do not contain
sysinst, but do on the other hand contain dump/rdump, restore/rrestore,
scsictl and chio in addition to the other stuff already on the install
floppies.
The images built are
rescue1.fs
rescue2.fs Based on the full INSTALL kernel, on two floppies
rescue-sm.fs Based on INSTALL_SMALL
rescue-ti.fs Based on INSTALL_TINY