Added ac-eras parameter, which enables multiple reward eras by allowing other ac_reward releated parameters to accept comma separated lists of values, one for each era

src/util.h

@@ -157,6 +157,17 @@ inline bool IsSwitchChar(char c)
 #endif
 }
 
+/**
+ * Return string argument or default value
+ *
+ * @param strVal string to split
+ * @param outVals array of numbers from string or default
+ *      if the string is null, nDefault is used for all array entries
+ *      else if the string has fewer than _MAX_ERAS entries, then the last 
+ *      entry fills remaining entries
+ */
+void SplitToi64(const std::string& strVal, int64_t[_MAX_ERAS]& outVals, int64_t nDefault);
+
 /**
  * Return string argument or default value
  *