Former-commit-id: b3af01891dae478ba9e1d4c8cfe9aeb41577987d

Former-commit-id: 538ea1fd3eb6ef70ce75be987134173cad0eb75c

DRK -> CRW

Max darksend amount -> 10000


Former-commit-id: 7861c573ed3bc24a5368d8a9d446571ee576b36a

Former-commit-id: 9158d212fc1b27f395912a189010341df2d65ffe

256e02f see 40f0d1f1dc6782d640beb925b14a7eccc6fbd69a and c96284a7879b02fdc365a9bb2e28fd8199c01e91 for more info

* Implement 12.1 MN signatures
* Remove redundant parts from v11->v12 migration

Closes #706

- active masternode ping should update mapSeenMasternodeBroadcast's lastPing too
- dseg should fill mapSeenMasternodeBroadcast to be able to serve it later on getdata with MSG_MASTERNODE_ANNOUNCE inv

- Clients that were waiting for remote activation were repeatidly checking their wallet and external address. This will make them skip that check if the wallet is empty, then be remotely activated by mnb.

- Clients that were waiting for remote activation were repeatidly checking their wallet and external address. This will make them skip that check if the wallet is empty, then be remotely activated by mnb.

- inject our node in old masrternodes' list / ping accordingly
- ignore dsee/dseep after SPORK_10_MASTERNODE_PAY_UPDATED_NODES is activated

- use map.insert instead of [] (should be safer)
- debug output / comments / spaces / names
- fix few long strings / make translatable one more label in UI

- Budgets now store the seen objects locally so they're not overwritten when saving/loading to check validity of budget.dat
- Added safer sync "failure" mode, that will retry an hour later if the sync fails for some reason. This will stop the client from thinking it has budget data and rejecting blocks when they're valid.
- protocol bump
- version bump

- better names (MASTERNODE_INITIAL was defined twice before that)
- move to proper header

- Do not rely on local lastTimeSeen and requested fRequested anymore. Use last know (signed) ping instead and base all logic on that. Should reduce mn list difference between
 nodes.
- Rework CActiveMasternode accordingly along with states, errorMessages, rpc etc.
- Clean some related code, move parts from public to private
- drop c_str in LogPrintf that were related to this functionality (todo: drop it for LogPrintf everywhere else)

Temporary unlock MN coins locked by -mnconflock on masternode start-alias/many and immediately lock them back right after finding all available coins

- Masternode nLastPaid is removed and a new caching system that keeps the last 30 days of coinbase payees replaces it
- To deal with some significant attack vectors, the masternode donation feature was removed. The donation feature was added to support developement anyway, so this will be replaced by the budgeting code.
-  This code should allow the network to come to consensus about who should be paid pretty effectively

- Fixed a race condition with masternode node selection upon new blocks
- Using nTime for lastpaid instead of the current time for high consensus