Fix polkit DTD redirect
The new canonical location for the polkit configuration DTD is:
https://specifications.freedesktop.org/PolicyKit/1.0/policyconfig.dtd
2 legacy URLs exist:
-
http://www.freedesktop.org/software/polkit/policyconfig-1.dtd
-
http://www.freedesktop.org/standards/PolicyKit/1.0/policyconfig.dtd
The former one needs to have a redirect setup, the latter needs to have its redirect fixed to not append -spec
.