[html form] use __linkto url parameter value as a default value of the corresponding field in a creation form (closes #2407770)

[rql2sql] fix generated SQL when an attribute relation with a variable is ored with another attribute relation. Closes #2410405

[repository] drop unused argument

[ui] actions box should be displayed if there are some actions, not if context is an entity. Closes #2419040

backport stable

[packaging] bump rql dependency to 0.29 (closes #2410042) Needed for add_eid_restriction with 4 args, usage of which was introduced in changeset aed065b97f12 (refactor entity fetch_rql method to use a RQL syntax tree instead of RQL strings)

[rql security] fix rql bug when using yams inheritance and read permissions (closes #2410156) problems occurings when querying using is_instance_of while a subtype has some permissions not shared by the parent type

[c-c schema] devtools: the output file for cw-ctl schema is not supposed to exist When using the 'file' type, logilab-common errors out if the file doesn't exist. Which, if the option refers to an output file, is not so useful. Use 'string' instead.

[fti] allow usage of custom RQL to fetch entities to index (closes #2410509)

[fti] make db-rebuild-fti accept etypes on command line (closes #2410508)

backport stable

[fti] drop entity cache once an etype is indexed (closes #2410507)

[server/utils] add_looping_task can be used any time (closes #2408814)

[formrenderers] if a tag object gets there, it blows (closes #2410462) - cwtags monkeypatches cubicweb's UStringIO's .write and .getvalue methods - but it cannot monkeypatch list.append ...

[login] redirect to real instance root if no postlogin_path is provided When not postlogin_path is provided, the login form issue a redirect to "/". The instance root may not be at "/" on the server. Then issuing a redirect to "/" send the user to the wrong location. We now redirect to "." which works fine because the "login" controller a direct children of instance root (http://babar.com/instance/login). All other redirection of the login controller use relative path too and then rely on this relative path from the login controleur to the instance root. This mechanism may be considered fragile and may deserve a proper fix. but this is to be discussed and implemented in another changeset.

[web/application] declare default 'content' value sooner (closes #2406560) It may be used while processing AuthenticationError. Such error may be raised before the former declaration.