docs: Update Oxidized integration to show example of SELinux setup

AUTHORS.md

@@ -170,6 +170,7 @@ LibreNMS contributors:
 - Andrew Wippler <andrew.wippler+librenms@gmail.com> (andrewwippler)
 - Robert Towster <rnt-github at towster.com> (towster)
 - Rocky Luke <rockyluke@offline.net> (rockyluke)
+- Tim Jackson <jackson.tim@gmail.com> (jackson-tim)
 
 Observium was written by:
 - Adam Armstrong

doc/Extensions/Oxidized.md

@@ -100,3 +100,9 @@ It's also possible to exclude certain device types and OS' from being output via
 $config['oxidized']['ignore_types'] = array('server');
 $config['oxidized']['ignore_os'] = array('linux');
 ```
+
+If you're runnng SELinux, you'll need to allow httpd to connect outbound to the network, otherwise Oxidized integration in the web UI will silently fail:
+
+```
+setsebool -P httpd_can_network_connect 1
+```

doc/Installation/Installation-CentOS-7-Apache.md

@@ -102,6 +102,7 @@ Add the following config:
     semanage fcontext -a -t httpd_sys_rw_content_t '/opt/librenms/logs(/.*)?'
     restorecon -RFvv /opt/librenms/logs/
     setsebool -P httpd_can_sendmail=1
+    sesetbool -P httpd_can_network_connect=1
 ```
 
 #### Restart Web server