Add release notes for version 4.9.5 with details of LimitRequestBody issue.

Author: GrahamDumpleton

docs/release-notes.rst

@@ -5,6 +5,7 @@ Release Notes
 .. toctree::
    :maxdepth: 2
 
+   release-notes/version-4.9.4
    release-notes/version-4.9.3
    release-notes/version-4.9.2
    release-notes/version-4.9.1

docs/release-notes/version-4.9.4.rst

@@ -0,0 +1,18 @@
+=============
+Version 4.9.4
+=============
+
+Version 4.9.4 of mod_wsgi can be obtained from:
+
+  https://codeload.github.com/GrahamDumpleton/mod_wsgi/tar.gz/4.9.4
+
+Bugs Fixed
+----------
+
+* Apache 2.4.54 changed the default value for ``LimitRequestBody`` from 0, which
+  indicates there is no limit, to 1Gi. If the Apache configuration supplied with
+  a distribution wasn't explicitly setting ``LimitRequestBody`` to 0 at global
+  server scope for the purposes of documenting the default, and it was actually
+  relying on the compiled in default, then when using mod_wsgi daemon mode, if a
+  request body size greater than 1Gi was encountered the mod_wsgi daemon mode
+  process would crash.