StackPath's object storage service no longer exists and all S3
endpoints are no longer operational.
Before this change, users could select StackPath as an S3 provider
during configuration, but connections would fail as the endpoints no
longer respond and the service has been discontinued.
After this change, StackPath is removed from the list of supported
S3 providers, preventing users from attempting to configure a
non-functional service.
Fixes#9148
- Add new Fastly provider with US East, US West, and EU Central regions
- Add `etag_is_not_md5` quirk for providers with mandatory encryption
- Disable server-side copy for Fastly (not supported)
Leon Brocard