[hooks/syncschema] do not crash on double removal of a constraint Some complicated migrations may entail a double constraint removal. It is not yet known whether this is a genuine cw bug or the result of a complicated migration story, but we should nevertheless not crash. Rather, emit a CRITICAL warning and proceed. Closes #3595309.

[doc/book] Fix typo in import

[server/session] fix a couple typos in doc strings

[server/migractions] finish migration to repoapi objects Changeset 241b1232ed7f (Use repoapi instead of dbapi for cwctl shell, upgrade and db-init) only did half of the job. It left the migration handler with both a session (cubicweb.server.session.Session) and a cnx (cubicweb.repoapi.ClientConnection) attribute with different ideas of what Connection they were talking to. With this change, we: - make the caller responsible of disabling security on the Connection if it wants to - turn mih.session into an actual attribute, set on __init__ - same for cnx (the client connection) - drop the "lazy connection" logic, and establish the connection up-front - always go through the connection instead of the session when we need to talk to the db

[server] use the ClientConnection directly now that it has more methods available Gets rid of ugly self.cnx._cnx.

[repoapi] add security/hook control and system_sql Just redirect these methods to the repo-side Connection.

[predicates] fix thinko in doc strings Replace "e.g." with more appropriate "i.e.". These are not examples.

[web/basecomponents] remove EtypeRestrictionComponent Closes #3119951

[ldapparser, book] document additional error causes

[js] remove leftover dead code in loadxhtml form.callback support was removed in changeset 68cde7431c2c, but some signs of it remained.