Add autoconfig

mail/config-v1.1.xml

+<?xml version="1.0" encoding="UTF-8"?>
+
+<clientConfig version="1.1">
+  <emailProvider id="kuschku.de">
+    <domain>kuschku.de</domain>
+    <displayName>kuschku.de Mail</displayName>
+    <displayShortName>kuschku.de</displayShortName>
+    <incomingServer type="imap">
+      <hostname>lithium.kuschku.de</hostname>
+      <port>143</port>
+      <socketType>STARTTLS</socketType>
+      <authentication>password-cleartext</authentication>
+      <username>%EMAILADDRESS%</username>
+    </incomingServer>
+    <outgoingServer type="smtp">
+      <hostname>lithium.kuschku.de</hostname>
+      <port>587</port>
+      <socketType>STARTTLS</socketType>
+      <authentication>password-cleartext</authentication>
+      <username>%EMAILADDRESS%</username>
+    </outgoingServer>
+  </emailProvider>
+</clientConfig>
\ No newline at end of file