Fedora and Red Hat Enterprise Linux use the SELinux mandatory access control system by default, for greater system security. This can cause difficult-to-identify issues when things fail with permission errors.
This documentation patch advises users on these platforms to enable two SELinux booleans to relax restrictions on Apache httpd's ability to talk to a memcache server and to send emails through a sendmail service.
It also contains a related note about how to link the apache-wsgi.conf into Fedora's apache configuration.

None, it's pure text.