* process governance objects in CheckMasternodeOrphanObjects as usual
* code refactoring: SetRateChecksHelper class added
* fixed race condition issues with propagation of governance objects
* change GetCollateralConfirmations signature
* code refactoring
* reduced minimum number of collateral confirmations required for relaying proposals
* bug fixes and improvements
* Flag governance items when MN's are removed
* Remove old broken update mechanism
* Do not flag MN state changes which are irrelevant to validity
* Call AddGovernanceVote
* Remove vote count check from IsValidLocally
* Do not check voted validity flag when syncing
* Do not send objects marked for deletion during syncing
* Remove node penalty for unrequested objects.
- some were not used, some were included twice, some were in the wrong place, some were missing (but it compiled because some were in the wrong place)
- organized a bit better, grouped dash specific includes in original bitcoin files, should save some time solving conflicts when/if merging patches later
* Change rate check logic to avoid DoS attacks
* Convert rate check to use object timestamp instead of arrival time
* Update cached variables before checking for superblocks
* Ensure that last times are monotonically non-decreasing
* Bump governance manager serialization format
* Improved rate check error reporting
* Increase quorum for object deletion to 2/3 of MN network
* Implement expiration of watchdog objects
* Remove objects from the watchdog map itself
* Message fix for invalid objects
