[ldapparser] demote some logs from warning to debug (closes #2713671)

[doc] add a what's new file for 3.18

merge stable in default (3.18) branch

Added tag cubicweb-centos-version-3.17.6-1, cubicweb-version-3.17.6, cubicweb-debian-version-3.17.6-1 for changeset 5b9fedf67a29

[pkg] prepare 3.17.6

Do not use cubicweb-card in rest_path tests Card overrides the rest_path method, so it does not make sense to use it in cw tests.

[inlined form field] fix regression introduced in 3.16.4/570208f74a84. Closes #3064653 In the above changeset, we changed ordered entities to be edited according to mandatory inlined constraints, though this leads to unpredictable order in cases where there are no constraint. This leads to case where inlined relation field may think there is no value related to a mandatory relation, while this is simply because there is a value specified but to an entity that will be created later (together with the relation). To fix this, we've to use the fact that the RelationField.process_form_value return None in cases where there is some entity to be created, while an empty set when there are no linked entity. The new no_value() method allows to differentiate between those different notion of 'no-value'.

[testlib] temporary_appobjects should call __registered__ if it exists. Closes #3064075

[entities] properly escape in EmailAddress.printable_value when format is html. Closes #3064025

Added tag cubicweb-version-3.17.5, cubicweb-debian-version-3.17.5-1, cubicweb-centos-version-3.17.5-1 for changeset 15dd5b37998b