spill manages symbolic links under one tree which point
to matching filenames in another. When individual
projects are configured with project/version-specific --
prefix= settings, to keep their installations segregated,
spill can make them appear to be installed in a common
place, e.g. under /usr/local. It can also delete the links
associated with a particular program. It is similar in
concept to various other programs such as stow, depot,
and relink. However, it's written in C, so it isn't reliant on
an interpreter being available. It also doesn't assume
complete control of the directory tree where the symbolic
links are created. It can create both absolute or relative
symbolic links, the latter being more convenient in some
setups.
