Explain what is happening when the user cancels vhost selection

certbot-apache/certbot_apache/obj.py

@@ -6,6 +6,7 @@ from certbot.plugins import common
 
 class Addr(common.Addr):
     """Represents an Apache address."""
+
     def __eq__(self, other):
         """This is defined as equalivalent within Apache.
 
@@ -18,6 +19,9 @@ class Addr(common.Addr):
                      self.is_wildcard() and other.is_wildcard()))
         return False
 
+    def __repr__(self):
+        return "certbot_apache.obj.Addr(" + repr(self.tup) + ")"
+
     def __ne__(self, other):
         return not self.__eq__(other)
 

certbot-apache/certbot_apache/tls_sni_01.py

@@ -129,6 +129,7 @@ class ApacheTlsSni01(common.TLSSNI01):
             # because it's a new vhost that's not configured yet (GH #677),
             # or perhaps because there were multiple <VirtualHost> sections
             # in the config file (GH #1042).  See also GH #2600.
+            logger.warn("Attempting to fall back to default vhost %s...", default_addr)
             addrs.add(default_addr)
             return addrs