Whitespace cleanups

Remove some trailing spaces and replace some tabs with spaces

lib/Qpsmtpd/Address.pm

@@ -182,7 +182,7 @@ address).  It returns a list of (local-part, domain).
 # be overriden (in hook_pre_connection, for example) if people have
 # different needs.
 our $atom_expr = '[a-zA-Z0-9!#%&*+=?^_`{|}~\$\x27\x2D\/]+';
-our $address_literal_expr = 
+our $address_literal_expr =
   '(?:\[(?:\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}|IPv6:[0-9A-Fa-f:.]+)\])';
 our $subdomain_expr = '(?:[a-zA-Z0-9](?:[-a-zA-Z0-9]*[a-zA-Z0-9])?)';
 our $domain_expr;

lib/Qpsmtpd/Postfix.pm

@@ -176,7 +176,7 @@ sub inject_mail {
   }
   # add an empty message length record.
   # cleanup is supposed to understand that.
-  # see src/pickup/pickup.c 
+  # see src/pickup/pickup.c
   $strm->print_rec('REC_TYPE_MESG', "");
 
   # a received header has already been added in SMTP.pm
@@ -203,6 +203,6 @@ sub inject_mail {
   $strm->close();
   return wantarray ? ($status, $qid, $reason || "") : $status;
 }
-  
+
 1;
 # vim:sw=2

lib/Qpsmtpd/SMTP.pm

@@ -666,8 +666,8 @@ sub data_respond {
 
         $self->transaction->header($header);
 
-	# NOTE: This will not work properly under async.  A
-	# data_headers_end_respond needs to be created.
+        # NOTE: This will not work properly under async.  A
+        # data_headers_end_respond needs to be created.
         my ($rc, $msg) = $self->run_hooks('data_headers_end');
         if ($rc == DENY_DISCONNECT) {
           $self->respond(554, $msg || "Message denied");
@@ -679,7 +679,7 @@ sub data_respond {
           return 1;
         }
 
-        # Save the start of just the body itself        
+        # Save the start of just the body itself
         $self->transaction->set_body_start();
 
       }