fixed. It also attempts to force boot-disk-only installs, but this seems to
lead to a problem that you have to deselect and reselect the installation disk.
If no-one comes up with a fix RSN I'll revert to the previous situation and
explain in the readme that you cannot install on a non-system-disk.
build directory is found to exist we don't clean it up. We also
use configure -C. All this lets us keep build directories, which
graeatly speeds up the process of debugging installers.
honor them). Use this when building the MacOSX binary installer to
get group-writeable files.
Ths fix works for directories and executables, not for files just yet,
because of bug #735274.