[web] Add missing import of _DATA_DIR in webctl Followup on d84bc85f7f70 which introduced usage of this name in _datadirs method of GenStaticDataDirMixIn but resulted into a NameError at runtime and makes migrations crash.

[server] unicode → text_type in utils

[views] unicode → six.text_type in views/authentication.py

[pyramid] Recreate CWSession entity when eid no longer exists As noted in comment, it might occur that we receive a "sessioneid" from a valid cookie while respective CWSession got dropped (typical case is db being recreated while users got preserved). In such case, we just recreate the CWSession entity as if it did not exist.

Added tag 3.26.1, debian/3.26.1-1, centos/3.26.1-1 for changeset 027676243aaa

[pkg] Drop non-existant files from MANIFEST.in

[pkg] Version 3.26.1

[test] Drop an unused function in cwconfig tests

[cwconfig] Always use "sys.prefix" to determine installation prefix We drop all legacy logic implemented in _find_prefix() which now happens to be buggy since we cleaned up setup.py in 3.26 (noticeably because virtualenv is no longer properly detected). Closes #17132990.

[cwconfig] Look for migration scripts directory relatively to code Thus getting rid of the last piece of data in "shared" directory. As a consequence, we can drop data_files from __pkginfo__.py. Related to #17132990.