Dash Core 0.12.1.5 is a maintenance release of the Dash Core 0.12.1.x seriesIn this minor release only bugfixes have been included and we consider this a stable release. (NOT Mandatory but Suggested)This release fixes a issue with proper watchdog propagation which causes rare "watchdog_expired" spikes.- multiple wd rate check (#1426)* Modify MasternodeRateCheck to support updating buffers only on failure* Update rate check buffer only when fAddToSeen is true- multiple vote fix (#1425)* Avoid adding the same vote multiple times to the vote file* Cleanup multiple votes in vote file- Fix potential race condition in vote processing (#1424)- Fix ProcessVerifyBroadcast (#1423)* check if mn rank can be calculated* fix "is in top" condition- Reject payment vote if masternode rank can't be calculated (#1422)- Don't add non-current wd's to seen map (#1417)Thanks to @UdjinM6 , @tgflynn, @schinzelh