[repository sources] copy source configuration: source's __init__ modify it while config.sources() return a cached dictionary which shouldn't be modified This causes pb since f8aa87a773b2 (though it's unclear why it hasn't been a problem before). Closes #2521848

cleanup repository connect doc: cnxtype is now deprecated / base_url has never been given that way. Follow #2521848

prefix "tcp://" zmq uris with "zmqpickle" (closes #2574114) * it turns "tcp://" into "zmqpickle-tcp://" * will leave room for future non-pickling communications using zmq

[db-api/configuration] simplify db-api and configuration so that all the connection information is in the repository url, closes #2521848 eg no more specific option of pyro ns host, group, etc. This also fixes broken ZMQ sources. Changes: * dropped pyro-ns-host, pyro-instance-id, pyro-ns-group from client side config, in favor of repository-uri. No migration done, supposing there is **no web-only config** in the wild. Also stop discovering the connection method through the repo_method class attribute of the configuration, varying according to the configuration class. This is a first step on the way to a simpler configuration handling. Notice those pyro options are still available for repository only / all-in-one configurations as they are needed to configure the pyro server. * stop telling connection method using ConnectionProperties, this is so boring. Also, drop _cnxtype from Connection and cnxtype from Session. The former is replaced by a is_repo_in_memory property and the later is totaly useless. * deprecate in_memory_cnx which becomes useless, use _repo_connect instead

[ldap test] ensure slapdd launch went fine and move ldapfeed setUp to parent class, as all ldap sources deal with url

[web/uihelper,uicfg] transform uihelper functions into uicfg objects methods (closes #2543949)

make ui configurations selectable (closes #2406609) * introduce a new 'uicfg' registry (storing instances) * use the relevant new APIs from lgc.registry to manage the new registrable uicfg objects * cw event manager useage is gone; instead thze standard registry reloading mechanism is used * ensure i18n commands still work (devctl) * introduce dynamic uicfgs use whenever possible (various views), even though sometimes the classic 'static' usage remains

[uicfg] uicfg.py moves from web/ to web/views/ (prepares #2406609) We are about to make uicfg selectable. Registrable / selectable views and helpers live in web/views. Hence the move. Backward compat is put in place. However CubicWeb imports of uicfg are updated to the new location.

[appobject] introduce RegistrableObject base class (prepares #2406609)

[cwvreg] introduce lgc version 0.59 and remove unneeded method redefinition (prepares #2406609) The new logilab.common.registry makes this moot.

[BFSS] mark fs_imported value as uncachable This will finally fix the `test_bfss_fs_importing_transparency` pass again. Regression was introduced by 4ba11607d84a

[entity] add a "repo_side" parameter to `_cw_dont_cache_attribute` This parameter (defaulting to `False`) is used to inform cubicweb that we really really do not want to cache a value during creation or update. This will be used by a storage that may do very specific processing on attribute values that result in a stored value different than the provided one (e.g. BFSS `fs_importing` mode).