Prepare for 4.11 release

* NEWS: Update for 4.11 release.
* debian/changelog: 4.11-1.
* strace.spec: 4.11-1.
diff --git a/NEWS b/NEWS
index ff7c00d..9623754 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-Noteworthy changes in release 4.11 (????-??-??)
+Noteworthy changes in release 4.11 (2015-12-21)
 ===============================================
 
 * Changes in behavior