update CHANGELOG

CHANGELOG

@@ -1,3 +1,21 @@
+2017-05-26 i3lock 2.9
+
+ • i3lock.1: use signal names without SIG prefix
+ • Removed obsolete inactivity timeout
+ • Added version files for release tarball.
+ • Set font face
+ • Automatically unlock (without having to press <Enter>) one attempt which was
+   entered while authenticating
+ • Stop leaking the image_path dup
+ • Displaying locking message when grabbing the pointer/keyboard
+ • Display error message when locking failed
+ • Add Enter on C-m
+ • Change input slices to be exactly pi/3 in size instead of slightly more
+ • Fix covering of composited notifications using the XComposite extension
+ • Remove last traces of DPMS
+ • Use bsd_auth(3) instead of PAM on OpenBSD
+ • Restore intended behaviour and don't use mlock(2) on OpenBSD.
+
 2016-06-04 i3lock 2.8
 
  • Remove DPMS support in favor of a wrapper script and xset(1).