libsdb

This is just to let you know libsdb does not compile under windows ( at least NT).
I tried to compile it even to another machine installing latest cygwin with no
success. I tried to ask to libsdb creator, but nothing happened.
So, I suggest to add in the userguide the warning that libsdb does not work
with windows, or better, to modify the source ro make it work under windoze :-)
It should only talk with odbc, I don't know if there is something else apart
from libsdb.
Andrea