root/pypi: links for delb-existdb

root/pypi delb_existdb-0.4.tar.gz
root/pypi delb_existdb-0.4-py3-none-any.whl
root/pypi delb_existdb-0.4rc1.tar.gz
root/pypi delb_existdb-0.4rc1-py3-none-any.whl