Avoid lock in tar building

Change-Id: If726018a137f9d1d6ea63c5b4b319d661fcaf271
diff --git a/Readme.pod b/Readme.pod
index b849760..e272014 100644
--- a/Readme.pod
+++ b/Readme.pod
@@ -58,7 +58,7 @@
 
   $ korapxml2krill serial -i <archive1> -i <archive2> -o <directory> -cfg <config-file>
 
-Convert archives sequentially. The inputs are not merged but treated
+Convert archives in serial. The inputs are not merged but treated
 as they are (so they may be premerged or globs).
 the C<--out> directory is treated as the base directory where subdirectories
 are created based on the archive name. In case the C<--to-tar> flag is given,
@@ -327,7 +327,7 @@
 Only valid for the C<archive> command.
 
 Writes the output into a tar archive.
-
+The tar needs to be opened with C<--ignore-zeros> afterwards.
 
 =item B<--sigle|-sg>
 
@@ -727,7 +727,7 @@
 
 =head1 COPYRIGHT AND LICENSE
 
-Copyright (C) 2015-2024, L<IDS Mannheim|https://www.ids-mannheim.de/>
+Copyright (C) 2015-2025, L<IDS Mannheim|https://www.ids-mannheim.de/>
 
 Author: L<Nils Diewald|https://www.nils-diewald.de/>