Add versionadded to doc
diff --git a/Doc/lib/libwsgiref.tex b/Doc/lib/libwsgiref.tex
index d797393..4b12e9d 100755
--- a/Doc/lib/libwsgiref.tex
+++ b/Doc/lib/libwsgiref.tex
@@ -5,6 +5,8 @@
\sectionauthor{Phillip J. Eby}{pje@telecommunity.com}
\modulesynopsis{WSGI Utilities and Reference Implementation}
+\versionadded{2.5}
+
The Web Server Gateway Interface (WSGI) is a standard interface
between web server software and web applications written in Python.
Having a standard interface makes it easy to use an application