use new dc_provider_new_from_email_with_dns() api (#1559)

DcCore/DcCore/DC/Wrapper.swift

@@ -542,8 +542,8 @@ public class DcContext {
         return Int(dc_add_device_msg(contextPointer, label, msg.cptr))
     }
 
-    public func getProviderFromEmail(addr: String) -> DcProvider? {
-        guard let dcProviderPointer = dc_provider_new_from_email(contextPointer, addr) else { return nil }
+    public func getProviderFromEmailWithDns(addr: String) -> DcProvider? {
+        guard let dcProviderPointer = dc_provider_new_from_email_with_dns(contextPointer, addr) else { return nil }
         return DcProvider(dcProviderPointer)
     }
 

deltachat-ios/Controller/AccountSetupController.swift

@@ -520,7 +520,7 @@ class AccountSetupController: UITableViewController, ProgressAlertHandler {
     }
 
     private func updateProviderInfo() {
-            provider = dcContext.getProviderFromEmail(addr: emailCell.getText() ?? "")
+        provider = dcContext.getProviderFromEmailWithDns(addr: emailCell.getText() ?? "")
         if let hint = provider?.beforeLoginHint,
             let status = provider?.status,
             let statusType = ProviderInfoStatus(rawValue: status),