Release notes 0.18.0

Bitcoin ABC version 0.18.0 is now available from:

https://download.bitcoinabc.org/0.18.0/

This release includes the following features and fixes: - Remove the bip9params configuration. - Remove the bip9_softforks result from the getblockchaininfo RPC call. - Remove the rules, vbavailable and vbrequired result from the getblocktemplate RPC call. - Remove the rules argument from the getblocktemplate RPC call. - Log difference between block header time and received time when competing blocks are received for the same chain height. - Bump automatic replay protection to May 2019 upgrade. - Remove topological ordering constraint from blocks starting Nov, 15 2018. - Implement canonical transaction order, enforced Nov, 15 2018. - Add OP_CHECKDATASIG and OP_CHECKDATASIGVERIFY, activates Nov, 15 2018. - Enforce minimum transaction size of 100 bytes, starting Nov, 15 2018. - Enforce PUSH ONLY rule for scriptSig, starting Nov, 15 2018. - Enforce CLEANSTACK rule, starting Nov 15, 2018.