Switch cpu-exec to real-time-measuring sio2jail #35
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This PR upstreams the switch to sio2jail for safely measuring real time, which was on prod for a few years.
The only issue is that the docker setup provided in OIOIOI does not work with sio2jail, but that should be addressed separately.
To actually use this in OIOIOI on simple (non-acm?) contests, one will need to set
USE_UNSAFE_EXEC = FalseandDEFAULT_SAFE_EXECUTION_MODE = "cpu"insettings.py.Here's a release for testing: http://github.com/otargowski/sioworkers/archive/refs/tags/rt-s2j-2.tar.gz