asks you where to load stuff from.
Initialise stuff so that 'install default set of sets' works.
Fix install loop, removing infinite loop if/when first kernel not selected.
of the sets after an error.
A side effect is that it now does fetch-install-fetch-install..., not
fetch-...-fetch-install-...install.
The set selection code now uses a byte per set (not a bit-pattern) removing
the restriction of 32 sets, and allowing a per set status display (TBC).
Also TBC is deleting sets from /usr/INSTALL.
However I believe it works...
It is worth remembering that trailing spaces are significant in the message
files - they cause a line break if the text is auto-filled to the RH margin.
(This is often the case when the text is a format string.)
Note: nothing (yet) checks the number (or type) of the format effectors in
the message strings. I found and fixed one big error, but others will
cause core dumps.
