The original and actual code is hosted on github (It's not permitted to post external links but you can search for ildar-shaimordanov/perl-utils)

Actually, posting external links is fine in general. What is frowned upon is refusing to post code here and instead saying "You can see my code at http://www.geocities.com/..." because over time the externally linked code may degrade or vanish and the resultant thread is then rather moot. Since you've posted your script here as it stands I fail to see how anyone could also object to linking to your github repo, especially when the README there links back to the monastery.

Your script looks in pretty good shape to me from a cursory inspection. I'll be pleased to test it out when I have some time.