Cybersecurity continues to command a lot of attention from enterprises looking for better protection from malicious hackers, and VCs want in on the action. In the latest example, TechCrunch has learned and confirmed that Upwind — a specialist in assessing and securing cloud infrastructure — is closing in on a $100 million round at a valuation of between $850-$900 million, post-money. The round includes a mix of new and existing investors such as Craft Ventures, Greylock, CyberStarts, Leaders Fun...