The problem appears to be related to AppArmor. Stopping AppArmor before starting cupsys removes the symptom of cupsd not being able to load libgnutls.so.13. As with the original reporter, on my system /usr/lib is a soft link to another file system.
The problem appears to be related to AppArmor. Stopping AppArmor before starting cupsys removes the symptom of cupsd not being able to load libgnutls.so.13.
As with the original reporter, on my system /usr/lib is a soft link to another file system.