Update README.md

* `DiscoveryConfig.GetDiscoveryConfig` returns an `IReadOnlyDictionary<string, DomainConfig>` now
* `DiscoveryConfig.KnownProxies` is an `IReadOnlySet<IPAddress>` now
* `DomainConfig.AcceptedDomains` and `DomainConfig.Protocols` is an `IReadOnlyList<string>` now
* `Protocol.LoginName_Delegate` changed
* `Protocol.CreateXml` changed
+ Added `DiscoveryConfig.Current`
+ `DiscoveryConfig.GetDiscoveryConfig` is virtual now
+ Added `DomainConfig.LoginNameMapping`
+ Added `DomainConfig.LoginNameMappingRequired`
+ Added `Protocol.DefaultLoginName`
+ Added `Protocol.LoginNameMapping`
+ Added `Protocol.LoginNameMappingRequired`

README.md

@@ -217,3 +217,11 @@ things for you:
 ```bash
 dotnet wan24AutoDiscover.dll autodiscover systemd > /etc/systemd/system/autodiscover.service
 ```
+
+## Login name mapping
+
+If the login name isn't the email address or the alias of the given email 
+address, you can create a login name mapping per domain and/or protocol, by 
+defining a mapping from the email address or alias to the login name. During 
+lookup the protocol mapping and then the domain mapping will be used by trying 
+the email address and then the alias as key.