Migration to Ubuntu 22.04, Perl 5.38 and PostgreSQL 14

Today's update (645472d) brings with it the following changes:

Security issues

  • Operating system has been updated to Ubuntu 22.04.

Performance improvements

  • Perl has been upgraded to version 5.38.
  • PostgreSQL has been upgraded to version 14.

Enhancements

  • Ensure e-Portal product only assigned to teachers are not accessible for students.
  • Changed HTTP status code emitted from front page handler to 200 when site is not configured.
  • Support IPv6 clients.

Bugfixes

  • Update atime when blob is accessed in cache directory. This improves cache cleanup behavior.

Feature removals / deprecations

  • Client-side performance monitoring using Report-To HTTP header has been disabled. This is to reduce costs for storage of this information, as it is no longer needed.
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