Comment # 1 on bug 1177621 from Tejas Guruswamy

AppArmor can never follow symlinks, by design unfortunately. So I don't think
there can be any global fix (except disable apparmor).

Instead I suggest adding modifications to 
  /etc/apparmor.d/local/usr.bin.redshift

probably you need to add something like
  owner @{HOME}/dotfiles/xorg/.config/redshift/redshift.conf r

The AppArmor profile in the oS package was included for the last two years. I
suspect AppArmor (for redshift at least) was simply not working on your
previous installation for some reason.