[datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Parsers now have to implement the `is_deleted(extid, etype, eid)` method that
should return a boolean telling if the given entity exists in the external
source or not.
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/entities/ usr/lib/PY_VERSION/site-packages/cubicweb
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/ext/ usr/lib/PY_VERSION/site-packages/cubicweb
debian/tmp/usr/share/cubicweb/cubes/ usr/share/cubicweb/
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/*.py usr/share/pyshared/cubicweb