monerod: MONERO_RANDOMX_FULL_MEM

[plowsof]

<sech1> neromonero1024 yes, you can make your Monero node to verify RandomX hashes in fast mode
<sech1> see https://github.com/monero-project/monero/pull/8677
<sech1> set MONERO_RANDOMX_FULL_MEM environment variable to 1 before running monerod
<sech1> or run it like "MONERO_RANDOMX_FULL_MEM=1 ./monerod ..."
<sech1> ofrnxmr ^
...
<sech1> It just increases memory requirements by 2 GB

Environment variable added to systemd:

[Service]
Environment=MONERO_RANDOMX_FULL_MEM=1

https://libera.monerologs.net/monero-dev/20240922#c432858