MUNICH :Germany's PSI Software is close to being taken over, with several financial investors circling the maker of software for energy networks, three people familiar with the matter told Reuters on Thursday. One of the sources said PSI, which is recovering from a cyberattack last year, is seeking funding for next-generation product development. Among the competing suitors are technology investors Thoma Bravo, HgCapital and Warburg Pincus, and a decision on a sale could be made within the next