Add changelog entry for Supervisor#1185

Author: mnaberez

CHANGES.txt

@@ -38,6 +38,10 @@
   same time.  Specifying a log filename of ``syslog`` is still supported
   but deprecated.  Patch by Jason R. Coombs.
 
+- Fixed a bug where `SupervisorTransport` (the XML-RPC transport used with
+  Unix domain sockets) did not close the connection when `close()` was
+  called on it.  Patch by Jérome Perrin.
+
 3.3.5 (2018-12-22)
 ------------------