Update mod_wsgi.rst

Changes deprecated pkg_add to pkg install, adds documentation for yum

docs/deploying/mod_wsgi.rst

@@ -29,12 +29,19 @@ follows:
 
     # apt-get install libapache2-mod-wsgi
 
+If you are using a yum based distribution (Fedora, OpenSUSE, etc..) you
+can install it as follows:
+
+.. sourcecode:: text
+
+    # yum install mod_wsgi
+
 On FreeBSD install `mod_wsgi` by compiling the `www/mod_wsgi` port or by
 using pkg_add:
 
 .. sourcecode:: text
 
-    # pkg_add -r mod_wsgi
+    # pkg install ap22-mod_wsgi2
 
 If you are using pkgsrc you can install `mod_wsgi` by compiling the
 `www/ap2-wsgi` package.