THIS IS A MANDATORY RELEASE YOU HAVE A MONTH FROM TODAY TO GET UPDATED FOR BLOCK 420420
From block 420420 rtm "futures" will be live which brings changes to the following RPC functions:
createrawtransaction with additional fields being available for the addition of block based or time based locktimes.
sendtoaddress with additional fields being available for the addition of block based or time based locktimes.
*Remember to avoid setting both locktimes as negative or you will freeze the coins for ever! More documentation on the docs site soon!
Also, we have added our fee setting spork so we will never find ourselves in a "gas" crisis.
Apart from the above main features, we have a speed up for the syncing of clients using a POW cache, a much smaller file that can significantly increase the speed of syncing a wallet!
Additional various functional fixes have been added to the QT wallet that include multiple bug fixes as well as additional optimizations for wallets with large numbers of transactions and improved thread handling.
Apart from the above mentioned RTM changes, this update brings a plethora of changes from its updates to Dash code:
The full details can be found here
They involve numerous RPC changes as well as backports form BTC 17 and 18 as well as updates and upgrades to most of the Dash features!