implement a simple statsd logger (closes #5488711) and add a few timing probes on: - etwist.server.CubicWebRootResource.render_request() - server.querier.QuerierHelper.execute() - server.sources.native.NativeSQLSource: - sqlexec() - compile_rql() - authenticate() - doexec() - doexecmany() as well as a pair of counters on server.querier.QuerierHelper cache (hit/miss).

[predicates] ExpectedValuePredicate now accepts a dict parameter ``match_form_params`` and ``match_kwargs`` benefit from that. For instance, the following statements are valid:: __select__ = match_form_params('vid', 'subvid') __select__ = match_form_params(vid='list', subvid='incontext') __select__ = match_form_params(vid=('list', 'tsearch')) In the latter cases, not only the parameters (``vid``/``subvid``) must be in the request form but their corresponding value must also match the expected values (or one of possible choices if `values` is a sequence). closes #5484070

[rql2sql] Fix iter_exists_sols() excessive cleaning of _state.tables Closes #5503548

[cwctl] allow overriding config settings from the command line (closes #5557656) eg. cubicweb-ctl start -p port:8082 myapp to overload the port parameter defined in the all-in-one.conf file.

avoid sanitizing warnings

[devtools] avoid warning about source['global-db-name'] sqlite and postgres db handlers store the db template name there.

[skeleton] remove no-break space from skeleton setup.py

[server/test] drop unused import

[doc] update 3.21 release notes

[devtools] Sort _cw_fields in fake_form Try to generate a predictable string, to help testing with PYTHONHASHSEED=random.