Merge branch 'master' into devel

bin/register-year

db/db.ddl

db/upgrade-20230929.sql

mo/db.py

mo/imports.py

mo/jobs/submit.py

mo/users.py

mo/util.py

mo/web/imports.py

mo/web/org_contest.py

mo/web/org_users.py

mo/web/table.py

mo/web/templates/doc_import.html

mo/web/templates/org_contest_add_user.html

mo/web/templates/org_contest_user.html

mo/web/templates/org_generic_import.html

mo/web/templates/org_user.html

mo/web/templates/settings.html

mo/web/user.py

mo/web/util.py