[devtools] "Keep" some temporary files/dirs around to help with debugging The whole QUnitTestCase runs with an @with_tempdir so it's redundant anyway.

[devtools] Fix Firefox launcher in QUnitTestCase (closes #4294727) The main changes are: - stop creating the profile, firefox will create it - point firefox to a profile directory instead of giving it a profile name (this has the added bonus of not polluting the user's profile list) - start firefox once and kill it 5 seconds later to let it finish its profile creation (along with system-wide extensions setup)

[devtools] allow cross-origin requests for qunit We have a mix of file:// html and http:// ajax calls. Which we should at some point fix to all be http, but. Related to #4294727.

merge 3.19.4 in 3.20 branch

[cors] Fix CORS headers generators The Access-Control-Allow-* and Access-Control-Expose-Headers are response headers, not request headers. Hence, we need generators for them. Closes #4412575.

[wsgi] Fix posted files filename reading The filenames are parsed by multipart.parse_form_data, which does the unicode decoding. Trying to re-decode the filename was leading to an error.

[pkg] Depend on Pillow instead of PIL The Pillow library is becoming the de-facto replacement for PIL. It also is way simpler to install with pip than PIL. Closes #4411354.

Added tag cubicweb-version-3.19.4, cubicweb-debian-version-3.19.4-1, cubicweb-centos-version-3.19.4-1 for changeset c4e740e50fc7

[pkg] 3.19.4

merge 3.18.6 into 3.19