http-date-0.0.12: ChangeLog.md

# ChangeLog for http-date

## 0.0.12

* Security: `formatHTTPDate` read outside its tables if `hdMonth` or
  `hdWkday` was out of range (a huge value could crash). Such values
  are now rendered as `___`.
* `epochTimeToHTTPDate` with a negative value spent a lot of CPU
  time and returned a wrong date. It now returns the correct date.