[web] add test for datadir-url option (related to #5204550)

[web] Add datadir-url configuration option (closes #5204550) Makes it possible to use a different host for static data instead of ${base_url}/data

[web] kill https-deny-anonymous option (closes #5193687) It doesn't make much sense to prevent people from using https.

[cwctl] don't filter DeprecationWarnings

[exceptions] avoid calling UniqueExceptionError.rtypes after closing the session

[web/test] Fix broken tests after commit b81adb5e32f9 Add missing n3rdf view to RDF view list.

[web/test] don't delete uicache directory Other tests use it, so the rmtree was a bit too much. Set CACHEDIR to a temporary subdirectory, and only delete that.

[web/views] add text/n3 rdf view Less shit than xml.

[schemas] make CWEType.final default to False (closes #5049201)

[repository] replace session with cnx in a few places

Don't pass an encoding to rqlst.as_string()

[rset] Deprecate the 'encoded' argument to ResultSet.printable_rql() It's hardly used at all, and when used inside CubicWeb, it's only set as false. Better make sure that this function always returns a proper unicode string and let the caller handle conversion on its own.

[gcdebug] ignore _NeedAuthAccessMock instances When looping over gc.get_objects(), we'd crash in _NeedAuthAccessMock.__getattribute__.

[views] Fix 'gc' view to use 'repo_gc_stats' service

[services] Fix 'repo_gc_stats' to return a list of unreachable objects' repr

[services] Prevent 'repo_stats' service from aggregating information It's up to the consumer of the service to decide whether it wants aggregated data or not... Ensure the /siteinfo page rendering is not modified.

[hooks] add a looping task that dumps the stats regularly in a file

[web/facet] Use an Exists node in HasRelationFacet The generated RQL now includes an EXISTS clause. For instance, one gets: :: DISTINCT Any WHERE X is CWUser, EXISTS(X in_group A) instead of: :: DISTINCT Any WHERE X is CWUser, X in_group A for a HasRelationFacet with ``rtype = 'in_group'``, which is more appropriate for testing the existence of the relation. Add a test for this facet along the way.

[debian] Add a Breaks for cubicweb-folder which stills use GMTOFFSET Related to #2154655.

[web] kill GMTOFFSET (closes #2154655) Its last user, set_cookie(expires=...), can just as well interpret its argument as UTC. Naïve datetime objects with an implicit non-UTC timezone are just awful.

[web/request] don't play tricks with utc offset We need an UTC datetime from a time.time()-type value. It turns out datetime provides a method to do just that. Related to #2154655.

[server/test] Drop dependency on folder cube Just copy schema bits when needed and drop a view (not possible anymore) in unittest_repository. Closes #5168939.

[web/test] Drop folder cube dependency Copy useful schema bits, define IBreadCrumbs adapter for Folder/fild_under (previously relying on ITree adapter) and adjust unittest_viewselector tests to drop a view that does not exist anymore. Related to #5168939.

merge 3.20.6 into 3.21