[hooks/syncschema] avoid altering a dropped table If the constraint's rdef is being removed, CWConstraintDelOp doesn't need to do anything. Otherwise it may try to alter a removed table/column. Closes #4154549

[js] fix name error

[devtools] improve error message when postgresql tools are missing By default in at least Debian, some pg tools are not present in the PATH. Or they may not be installed. But the tests tools expects them to be in the PATH, and give an unhelpful 'No such file or directory' backtrace if they're not found. To help devs using the pg tests we improve the error message.

[server] Replace non portable strftime formatter (closes #4132161)

[web/request] use a picklable Counter object for tab index counters Related to #1381328.

[web/auth] The auth retriever's authenticated() callback takes a session, not a cnx We don't have a cnx at that point.

[test] Fix the query-log-file test Testing this functionality in a CubicWebTC is awkward because the wrapping happens in handle_request, which tests basically bypass (they call core_handle directly, and do their own magic for linking the request with a cnx). The test method worked when ran on its own, but not together with the rest of the test class. So use a CubicWebServerTC instead, which goes through the whole stack.

[doc/book] spelling fixes in security tutorial

[doc/book] spelling fixes in "testing" chapter

[datafeed sources] finish the session -> cnx switch Related to #3933480.