CMake Nightly Date Stamp
suppress warnings about rand() and srand() on OpenBSD

We don't do crypto here, so a "poor" random doesn't matter. In fact we have API
to allow people to get a repeatable sequence by setting a specific seed.
Merge topic 'openbsd-warnings' into next

0b4d2c79 suppress warnings about rand() and srand() on OpenBSD
973b3e7d CMake Nightly Date Stamp