Make deprecation height different between mainnet, testnet and regtest#23

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MarkLTZ wants to merge 2 commits intoCryptoForge:masterfrom

MarkLTZ:APPROX_RELEASE_HEIGHT

Commits on Nov 4, 2020

Add missing <stdexcept> header for std::invalid_argument
MarkLTZ
committed

Commits on Nov 5, 2020

Make deprecation height different between mainnet, testnet and regtest
MarkLTZ
committed