How difficult would it be for someone to create an open-source version of this tool? From the readme for the now-paywalled utility, it seems that the utility on

How difficult would it be for someone to create an open-source version of this tool? From the readme for the now-paywalled utility, it seems that the utility only modifies a single directory in a predictable way... http://www.oracle.com/technetwork/java/javase/tzupdater-readme-136440.html#remove http://www.oracle.com/technetwork/java/javase/tzupdater-read...