message: [Core] raise nTargetTimespan_V2 to 30 minutes
diff: @@ -184,7 +184,7 @@ public:
  nTargetSpacing = 1 * 60; // 1 minute
  nTargetTimespan = 40 * 60; // 40 minutes
  nTimeSlotLength = 15; // 15 seconds
  - nTargetTimespan_V2 = nTimeSlotLength * 60; // 15 minutes
  + nTargetTimespan_V2 = 2 * nTimeSlotLength * 60; // 30 minutes
  nMaturity = 100;
  nStakeMinDepth = 600;
  nFutureTimeDriftPoW = 7200;
  