* Adapt storage: SyncServers write to file option, export FlushToFile
* CLI built-in updater for old and new PIA servers
* Update hardcoded IP addresses for PIA old and new servers
* Add PIA old to allServers struct and update timestamps
* Adapt code to work with new and old PIA servers
* Remove PIA subdomains (unneeded) from resolver tool
- PIA updated
- Surfshark updated
- Windscribe updated (US East and Slovenia removed)
- Capital letters fixed for regions of Windscribe
- Resolver program updated to match latest format for constants
- Max of 10 simultaneous goroutines to avoid being throttled by DNS
- All template formatting moved to formatLine function
- resolveRepeat is synchronous to avoid being throttled by DNS