Changelog for recent coverity issues

changes/cov_485,486,487

@@ -0,0 +1,5 @@
+  o Minor bugfixes:
+    - Fix memory leaks in the failing cases of the new SocksPort and
+      ControlPort code. Found by Coverity Scan. Bugfix on
+      0.2.3.3-alpha; fixes coverity CID 485, 486, and 487.
+