v2.0.0.9

2.0.0.9

CORE - Major witness validation performance improvement and memory usage reduction due to partial chain cloning
CORE - Move some invalid block logic earlier in the block check process, this should help address some issues users have been experiencing as well as further stabalise the network.
CORE - Simplify phase2/phase3 checks now that we know the final blocks where they activated; This will help performance in various ways and simplifies the code.
CORE - Some minor performance improvements
UI - Fix an underlying issue that was causing a "scary" looking message dialog to occasionally pop up and bother some users.
UI - Fix an issue with witness earnings graph display for units other than "blocks"
CMDFLAG - Add a new flag limitdeltadiffdrop=n for mining pools, larger mining pools should set this to 0. Medium pools 1-6, very small pools can leave it off.
CMDFLAG - Add new "minimallogging" flag for the benefit of users with limited disk space e.g. pi users