chaincfg: add BIP0009 deployment parameters for the CSV soft-fork
chaincfg: add BIP0009 deployment parameters for the CSV soft-fork

This commit adds BIP-9 deployment parameters for all registered
networks for the CSV soft-fork package.

The mainnet and testnet parameters have been set in accordance to the
finalized BIPs.

For simnet, and the regression net, the activation date is back-dated
in order to allow signaling for the soft-fork at any time. Additionally
the expiration time for simnet and regrets has been set to
math.MaxInt64, meaning they’ll never expire.

Stash-Crypto/btcd,btcsuite/btcd,cqswxj2013/btcd,ltcsuite/ltcd,aakselrod/btcd,dajohi/btcd,Roasbeef/btcd,davecgh/btcd,ltcsuite/ltcd,wallclockbuilder/btcd,ppcsuite/ppcd,btcsuite/btcd,tb00/btcd,dajohi/btcd,dajohi/btcd,tb00/btcd,wallclockbuilder/btcd,aakselrod/btcd,Roasbeef/btcd,Stash-Crypto/btcd,davecgh/btcd,cqswxj2013/btcd,ppcsuite/ppcd