[server test] simplify data-schemaserial test instance's schema

[multi-sources-removal] Drop (dont_)cross relation related code That was only needed for now deleted 'true' multisources. Related to #2919300 [jcr: also remove it from server/test/data-schemaserial/schema.py]

[multi-sources-removal] Simplify repo.delete_info_multi arguments, uri is no more used Related to #2919300

[multi-sources-removal] Drop deleted_entities system table and entities.mtime column since they were only used by the entities_modified_since api of the repository which has been dropped. Along with them, the multi-sources-etypes configuration variable and some sql queries at modification/deletion time of entities. Bon vent ! Related to #2919300

[multi-sources-removal] drop repository entities_modified_since public api actually only used by pyrorql/zmqrql sources which have been dropped. This will allow to drop a bunch of system meta-data (eg deleted_entities) Related to #2919300

[multi-sources-removal] Drop the "true" multi-sources planner Only keep copy-based sources. This will soon allow for greater code simplification. Related to #2919300

[multi-sources-removal] Drop cw.server.sources.extlite no more used for a while, beside an utility class Related to #2919300

[multi-sources-removal] Move cw.server.sources.ConnectionWrapper where it belongs It's only used by the ldap utilities. Related to #2919300

[multi-sources-removal] Drop pyrorql and zmqrql sources After a few years experementing "true" multi-sources, we're now moving to "copy-based" source à la datafeed. As pyro and zmq sources have no more known customers and the related code is in the way of future refactoring of cubicweb's core, we decided to drop support for those sources without backward compatibility. If you're still using a zmqrql or pyrorql source and you want to upgrade, ask support to move it to datafeed using a pre-3.19 version first. Related to #2919300 (first step)

[web/formfields] Make CompoundField inherit needs_multipart from its subfields If there's a FileField within a CompoundField, the latter will not have the enctype multipart set, even though the FileField needs it. CompoundField should inspect its children fields to determine whether it needs multipart. Closes #3406930.

[wsgi/handler] fix api change from 3.18

[req] deprecate get_cache (closes #3181499)

Added tag cubicweb-version-3.18.2, cubicweb-debian-version-3.18.2-1, cubicweb-centos-version-3.18.2-1 for changeset 6880674c1a26

merge 3.17.12 into 3.18 branch

[editcontroller] fix cardinality computation (closes #3120495)

Added tag cubicweb-version-3.17.12, cubicweb-debian-version-3.17.12-1, cubicweb-centos-version-3.17.12-1 for changeset 838d58a30f7e

[debian] move yams max version to Depends And fix a syntax error and wrong package name in the process.

[pkg] prepare 3.17.12

[web] Fix typo in docstring

[test] remove custom implementation of FakeRequest.header_accept_language() (closes #3375021) ``Accept-Language`` should be overridable just as any other request header. Default value is "nothing" since the application should be able the empty header case.

[adapters] fix a name stomping error (entity) Also give proper name to subject (role, not target), and kill unused variable.

[entities] unconditionnally sanitize the html output of printable_value Closes jpl##49466

[doc] Update the debian stable name to wheezy

[i18n] Fix two typos

fix deprecation info

[web error] exception may not have a 'status' attribute, generating an AttributeError that hides the original error. Closes #3381670

[test api] extract a context manager to temporarily disable app.error_handler monkey patch

[views/workflow/tmppng] fix console crash on nth call to this one-shot view The underlying design issue is not addressed here, only a cosmetic and "we understand and document what's happening" note. Related to #3400448.

[dataimport] The subjtype should be the subject of a relation, not the object, closes #3365113

[testlib] Fix assertMessageEqual assertEqual(msg, msg) had a hard time failing.