* introduce restrictions on generators at a specific height. disallow division on negative numbers and disallow redundant leading zeros on integer condition arguments (produced by a generator)
* use SOFT_FORK_HEIGHT constant
* there is no need to specify height when validating block in block_creation
* Update tests/core/full_node/test_mempool.py
Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>
Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>