Typo fixes in comments

src/policy/fees.cpp

@@ -87,7 +87,7 @@ double TxConfirmStats::EstimateMedianVal(int confTarget, double sufficientTxVal,
     int maxbucketindex = buckets.size() - 1;
 
     // requireGreater means we are looking for the lowest fee/priority such that all higher
-    // values pass, so we start at maxbucketindex (highest fee) and look at succesively
+    // values pass, so we start at maxbucketindex (highest fee) and look at successively
     // smaller buckets until we reach failure.  Otherwise, we are looking for the highest
     // fee/priority such that all lower values fail, and we go in the opposite direction.
     unsigned int startbucket = requireGreater ? maxbucketindex : 0;