directories or links before we install the new things, but now we don't
delete /usr/share/examples itself, so other examples installed from
other places in the tree will not be touched.
have a choice between SHARED=copies and SHARED=symlinks. The default
is to copy.
I have also added a /usr/share/examples/etc directory, where I hope to
have all sample configuration files which in real use go into /etc installed.
(This way, if the user really screws the real one up, they can always go
back to a known-working distribution copy, even if they don't have sources.)
