[2025] Make the master run on 127.0.0.1

This is because incoming NOTIFYs on the slave have to match
the address family of where it listens on.

tests/lettuce/configurations/xfrin/retransfer_master.conf

@@ -10,8 +10,8 @@
     "Auth": {
         "database_file": "data/example.org.sqlite3",
         "listen_on": [ {
-            "port": 47807,
-            "address": "::1"
+            "address": "127.0.0.1",
+            "port": 47807
         } ]
     },
     "Xfrout": {

tests/lettuce/features/xfrin_bind10.feature

@@ -24,7 +24,7 @@ Feature: Xfrin
     The file data/test_nonexistent_db.sqlite3 should exist
 
     A query for www.example.org should have rcode REFUSED
-    When I send bind10 the command Xfrin retransfer example.org IN ::1 47807
+    When I send bind10 the command Xfrin retransfer example.org IN 127.0.0.1 47807
     Then wait for new bind10 stderr message XFRIN_TRANSFER_SUCCESS not XFRIN_XFR_PROCESS_FAILURE
     Then wait for new bind10 stderr message ZONEMGR_RECEIVE_XFRIN_SUCCESS
     A query for www.example.org should have rcode NOERROR