Don't drop mnb-s for outdated MNs (#2131)
Don't drop mnb-s for outdated MNs (#2131)

Instead just mark them as MASTERNODE_UPDATE_REQUIRED and proceed further.
ionomy/ion,ionomy/ion,crowning-/dash,thelazier/dash,thelazier/dash,thelazier/dash,UdjinM6/dash,biblepay/biblepay,ionomy/ion,UdjinM6/dash,ionomy/ion,ivansib/sibcoin,biblepay/biblepay,UdjinM6/dash,dashpay/dash,dashpay/dash,ivansib/sibcoin,nmarley/dash,dashpay/dash,crowning-/dash,nmarley/dash,thelazier/dash,biblepay/biblepay,dashpay/dash,nmarley/dash,ivansib/sibcoin,biblepay/biblepay,ionomy/ion,ivansib/sibcoin,ionomy/ion,nmarley/dash,crowning-/dash,biblepay/biblepay,ivansib/sibcoin,UdjinM6/dash,ivansib/sibcoin,crowning-/dash,nmarley/dash,UdjinM6/dash,nmarley/dash,biblepay/biblepay,biblepay/biblepay,nmarley/dash,biblepay/biblepay,thelazier/dash,dashpay/dash,crowning-/dash,crowning-/dash