- From `pia` to `private internet access`
- From `perfectprivacy` to `perfect privacy`
- From `vpnunlimited` to `vpn unlimited`
- This is done to match string constants in the code for another refactor
- Reset each of these providers servers version to `1`.
- No more global variables
- Inject merged servers to configuration package
- Fix#566: configuration parsing to use persisted servers.json
- Move server data files from `internal/constants` to `internal/storage`
