Added creation of differential archives for a user profile

lib/cl_keys.c

@@ -52,5 +52,8 @@ int clearKey(char *login)
     buffer = "XXXXXXXX";
     key_serial_t dest;
     dest = KEY_SPEC_USER_SESSION_KEYRING;
-    return add_key("user", login, buffer, strlen(buffer), dest);
-};
+    if (add_key("user", login, buffer, strlen(buffer), dest)!=-1)
+      return 0;
+    else
+      return 1;
+};