issue #404: add to Changelog.

docs/changelog.rst

@@ -174,6 +174,7 @@ Fixes
 ^^^^^
 
 * `#251 <https://github.com/dw/mitogen/issues/251>`_,
+  `#404 <https://github.com/dw/mitogen/issues/404>`_,
   `#412 <https://github.com/dw/mitogen/issues/412>`_: connection delegation and
   ``delegate_to:`` handling suffered a major regression in 0.2.3. The 0.2.2
   behaviour has been restored, and further work has been made to improve the
@@ -426,10 +427,12 @@ bug reports, testing, features and fixes in this release contributed by
 `Mohammed Naser <https://github.com/mnaser/>`_,
 `Peter V. Saveliev <https://github.com/svinota/>`_,
 `Stéphane <https://github.com/sboisson/>`_,
+`Tom Parker-Shemilt <https://github.com/palfrey/>`_,
+`Younès HAFRI <https://github.com/yhafri>`_,
+`@myssa91 <https://github.com/myssa91>`_,
 `@syntonym <https://github.com/syntonym/>`_,
-`@whky <https://github.com/whky/>`_,
+`@whky <https://github.com/whky/>`_, and
-`@yodatak <https://github.com/yodatak/>`_, and
+`@yodatak <https://github.com/yodatak/>`_.
-`Younès HAFRI <https://github.com/yhafri>`_.
 
 
 v0.2.3 (2018-10-23)