Latest commit 769bc15 Mar 18, 2017 @Rochet2 Rochet2 committed with Shauren Tools/MMapsGenerator: Use system supported threads instead of hardcod…
…ed amount (#19255)

- Use unsigned int for thread count
- Use std::thread::hardware_concurrency() to try estimate available threads instead of hardcoded 3 threads by default
- Print thread count always regardless of using --threads switch or not