iquik: WiP preboot (bootinfo-like wrapper for OW) work

And some renames. preboot works by itself, not yet integrated
into the iQUIK installer.

second.b -> iquik.b

quik -> iquik

quik.conf -> iquik.conf

Man files still need work.

Signed-off-by: Andrei E. Warkentin <andrey.warkentin@gmail.com>