ChangeLog: add entry for PR merge
incorrect hash when using aggregate function
* [Issue #267](https://github.com/grobian/carbon-c-relay/issues/267)
segmentation fault when trying to use a file cluster
+* [PR #273](https://github.com/grobian/carbon-c-relay/pull/273)
+ regex matching slow on glibc due to lock contention
# 3.1 (29-04-2017)
