More admin use cases.

doc/domain/domain.dot

@@ -0,0 +1,11 @@
+digraph kurz_domain {
+  node [ shape=none];
+  target_url [
+    label="Target URL"
+  ];
+  short_url [
+    label="Short URL"
+  ];
+
+  short_url -> target_url
+}

doc/use_cases/ops/ops1.md

@@ -13,3 +13,7 @@ I need to have a SystemD service for kurzd
 As a system administrator for a system without SystemD
 In order to deploy Kurz
 I need to have a SysV service for kurzd
+
+As a system administrator
+In order to guarantee traceability
+I need to access Kurz operation logs

doc/use_cases/users/users2.md

@@ -0,0 +1,3 @@
+As a Kurz customer
+In order to access my own Kurl URLs
+I need to login