consensus/consensus.h: unify fork trigger code
consensus/consensus.h: unify fork trigger code

btc1/bitcoin,elecoin/elecoin,elecoin/elecoin,btc1/bitcoin,core-bitcoin/bitcoin,elecoin/elecoin,core-bitcoin/bitcoin,btc1/bitcoin,elecoin/elecoin,btc1/bitcoin,core-bitcoin/bitcoin,btc1/bitcoin,core-bitcoin/bitcoin,btc1/bitcoin,elecoin/elecoin,core-bitcoin/bitcoin,core-bitcoin/bitcoin,elecoin/elecoin