prefix "tcp://" zmq uris with "zmqpickle" (closes #2574114)
* it turns "tcp://" into "zmqpickle-tcp://"
* will leave room for future non-pickling communications using zmq
What's new in CubicWeb 3.16?
============================
New functionnalities
--------------------
* Add a new dataimport store (`SQLGenObjectStore`). This store enables a fast
import of data (entity creation, link creation) in CubicWeb, by directly
flushing information in SQL. This may only be used with PostgreSQL, as it
requires the 'COPY FROM' command.
API changes
-----------
* db-api/configuration: all the external repository connection information is
now in an URL (see #2521848), allowing to drop specific options of pyro ns
host, group, etc and fix broken ZMQ source. Configuration related 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.
* Stop discovering the connection method through `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.
DB-API related changes:
* Stop indicating the connection method using `ConnectionProperties`.
* Drop `_cnxtype` attribute 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
if necessary.
* the "tcp://" uri scheme used for ZMQ communications (in a way
reminiscent of Pyro) is now named "zmqpickle-tcp://", so as to make
room for future zmq-based lightweight communications (without python
objects pickling).
Unintrusive API changes
-----------------------
* Drop of `cubicweb.web.uicfg.AutoformSectionRelationTags.bw_tag_map`,
deprecated since 3,6.
User interface changes
----------------------
* Remove changelog view, as nor cubicweb nor known cubes/applications were properly
feeding related files