text: ADDITIONAL LICENSE TERMS
  
  In addition to the standard GPL 2.0 license, here are some
  conditions I'd like to clarify.
  
  0. If you modify this product, you MUST publish your changes. Period.
  
  1. If you re-write this product in other language (e.g. C++) and
     "intently view" the product's Perl sources while coding, you must
     also license your results as GPL 2.0.
  
  2. The author of this product (Dmitry Koterov, http://dmitry.moikrug.ru) may
     change the product's license type and any of license conditions.
     He is also permitted to make non-published private modifications.
  
  If you have questions, fill free to contact the author.
  