no motd for rsync copying

sync.pl

@@ -16,7 +16,7 @@
     my @to_sync = @{$dirs{$sync}};
     my $dest    = pop @to_sync;
     chdir glob('~') or die "Cannot chdir: $!";
-    system('rsync', '-az', '--delete', @to_sync, "feather3:$dest");
+    system('rsync', '-az', '--no-motd', '--delete', @to_sync, "feather3:$dest");
     if ($? == -1) {
         say "failed to execute rsync: $!";
         exit 2;