Revert #923, there are objections against it because it is good to know why the reverse DNS lookup failed.

git-svn-id: https://svn.perl.org/qpsmtpd/trunk@924 958fd67b-6ff1-0310-b445-bb7760255be9

Changes

@@ -1,6 +1,3 @@
-  async: Set connection remote_host only when the reverse DNS lookup is
-  successful
-
   Create async version of dns_whitelist_soft, rhsbl and uribl plugins.
 
   async: added pre- and post-connection hooks

lib/Qpsmtpd/PollServer.pm

@@ -183,7 +183,7 @@ sub start_conversation {
     ParaDNS->new(
         finished   => sub { $self->continue_read(); $self->run_hooks("connect") },
         # NB: Setting remote_info to the same as remote_host
-        callback   => sub { $conn->remote_info($conn->remote_host($_[0])) if $_[0] !~ /^[A-Z]+$/ },
+        callback   => sub { $conn->remote_info($conn->remote_host($_[0])) },
         host       => $ip,
     );