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2018-08-10Use the crypto random functions instead of `rand()`.iphydf
Presumably the uses of `rand()` were fine because they were not used in security-sensitive places, but having to think about whether a crappy RNG is acceptable in each situation requires effort that could better be spent elsewhere. Also, this means that once we have a custom deterministic RNG for testing, that RNG is used everywhere, so all the code is deterministic. It also allowed us to delete a system-specific function that wasn't used anywhere except in a call to `srand()`.
2018-07-09Factor out time keeping code into its own module: mono_time.c.iphydf
It turns out, `unix_time` is also monotonic, and is used as such, so I've renamed the new functions to `mono_time_*`. 2018-07-08: ``` 00:01 <@irungentoo> the idea used to be that the unix_time() function could go backward in time but I think I might have started using it like if it could not after I changed it so that it would never go back in time ```