Backport fixes to svtplay service support from 3.2
Backport fixes to svtplay service support from 3.2

The svtplay support was broken by update to the web site. This backports
the support from 3.2 to 3.0 as Debian is in soft freeze, and we'll try
to do targetted and minimal changes.

Reference: https://github.com/spaam/svtplay-dl/issues/1335

olof/debian-svtplay-dl,olof/debian-svtplay-dl