[req,web] Make it possible to handle page language from URL prefix
Adding a short language prefix to URL (like "/en" or "/fr") changes the
language the pages are displayed in. This prefix is kept during navigation.
This way it is not necessary to do language negotiation, nor to use user
preferences to determine which language to apply.
This behavior is controlled through a new configuration option
"language-mode", which replaces "language-negociation" option and which values
may be "http-negotiation", "url-prefix" or "" (to disable language setting and
force using "ui.language" property). Migration from previous option is not
handled because I could not manage to have it working (users will get prompted
with the configuration file diff anyways).
Add some tests checking various scenarios.
Closes #15743487
include README
include README.pyramid.rst
include COPYING
include COPYING.LESSER
include pylintrc
include jshintrc
include tox.ini
include bin/cubicweb-*
include man/cubicweb-ctl.1
include doc/*.rst
include doc/*.txt
include doc/Makefile
recursive-include doc/book *
recursive-include doc/tools *.py
recursive-include doc/tutorials *.rst *.py
recursive-include doc/api *.rst
recursive-include doc/_themes *
recursive-include doc/_static *
include doc/_templates/*.html
include doc/changes/*.rst
recursive-include doc/dev *.txt *.rst
recursive-include doc/images *.png *.svg
include doc/conf.py
include cubicweb/devtools/fix_po_encoding
recursive-include cubicweb/misc *.py *.png *.display
include cubicweb/web/views/*.pt
recursive-include cubicweb/web/data external_resources *.js *.css *.py *.png *.gif *.ico *.ttf *.svg *.woff *.eot
recursive-include cubicweb/web/wdoc *.rst *.png *.xml
recursive-include cubicweb/devtools/data *.js *.css *.sh
recursive-include cubicweb/i18n *.po
recursive-include cubicweb/schemas *.py *.sql
recursive-include requirements *.txt
recursive-include cubicweb/test/data bootstrap_cubes *.py *.sql
recursive-include cubicweb/test/data-rewrite bootstrap_cubes *.py
recursive-include cubicweb/test/data_schemareader *.py
recursive-include cubicweb/dataimport/test/data *.py *.csv *.txt
recursive-include cubicweb/dataimport/test/data-massimport *.py
recursive-include cubicweb/devtools/test/data *.py *.txt *.js *.po.ref
recursive-include cubicweb/entities/test/data *.py
recursive-include cubicweb/etwist/test/data *.py
recursive-include cubicweb/ext/test/data *.py
recursive-include cubicweb/hooks/test/data-computed *.py
recursive-include cubicweb/hooks/test/data *.py
recursive-include cubicweb/sobjects/test/data bootstrap_cubes *.py
recursive-include cubicweb/server/test/data bootstrap_cubes *.py source* *.conf.in *.ldif
recursive-include cubicweb/server/test/data-cwep002 *.py
recursive-include cubicweb/server/test/datacomputed *.py
recursive-include cubicweb/server/test/data-schema2sql toignore
recursive-include cubicweb/server/test/data-migractions bootstrap_cubes *.py
recursive-include cubicweb/server/test/data-schemaserial *.py
include cubicweb/web/test/testutils.js
recursive-include cubicweb/web/test/data bootstrap_cubes pouet.css *.py
recursive-include cubicweb/web/test/data/static/jstests *.js *.html *.json
include cubicweb/web/data/jquery-treeview/*.md
recursive-include cubicweb/skeleton *.py *.css *.js *.po compat *.tmpl rules
prune cubicweb/misc/cwfs