Update install doc file names to be clearer

doc/Extensions/RRDCached.md

@@ -107,5 +107,5 @@ Disk I/O can be found under the menu Devices>All Devices>[localhost hostname]>He
 Depending on many factors, you should see the Ops/sec drop by ~30-40%.
 
 
-[1]: http://librenms.readthedocs.org/Installation/Installation-(RHEL-CentOS)/#add-localhost
+[1]: http://librenms.readthedocs.org/Installation/Installation-CentOS-7-Apache/
 "Add localhost to LibreNMS"

doc/Extensions/Smokeping.md

@@ -51,7 +51,7 @@ You should now see a new tab in your device page called ping.
 
 ### Install and integrate Smokeping [Debian/Ubuntu] ###
 
-> This guide assumes you have already <a href="http://docs.librenms.org/Installation/Installation-(Debian-Ubuntu)/">installed librenms</a>, and you installed apache2 in the process. Tested with Ubuntu 14.04 and Apache 2.4.
+> This guide assumes you have already <a href="http://docs.librenms.org/Installation/Installing-LibreNMS/">installed librenms</a>, and you installed apache2 in the process. Tested with Ubuntu 14.04 and Apache 2.4.
 
 Nearly everything we do will require root, and at one point we'll encounter a problem if we just use sudo, so we'll just switch to root at the beginning...
 

doc/Extensions/Varnish.md

@@ -13,7 +13,7 @@ Varnish is caching software that sits logically between an HTTP client and an HT
 
 In this example we will assume your Apache 2.4.X HTTP server is working and
 configured to process HTTP requests on port 80.  If not, please see
-[Using HTTPd Apache2](http://librenms.readthedocs.org/Installation/Installation-(RHEL-CentOS)/#using-httpd-apache2)
+[Installing LibreNMS](http://librenms.readthedocs.org/Installation/Installing-CentOS-7-Apache)
 
 
 #### Install Varnish 4.0 RPM ####

doc/Installation/Installation-CentOS-6-Apache-Nginx.md

@@ -1,4 +1,4 @@
-NOTE: What follows is a very rough list of commands.  This works on a fresh install of CentOS 6.4 and CentOS 7.
+NOTE: What follows is a very rough list of commands.  This works on a fresh install of CentOS 6.x.
 
 NOTE: These instructions assume you are the root user.  If you are not, prepend `sudo` to all shell commands (the ones that aren't at `mysql>` prompts) or temporarily become a user with root privileges with `sudo -s`.
 

doc/Installation/Installing-LibreNMS.md

@@ -20,10 +20,10 @@ If you want to install yourself then we have some new documentation which should
 
 If the above are missing or incomplete then you can try our old docs below.
 
-[Debian/Ubuntu](http://docs.librenms.org/Installation/Installation-(Debian-Ubuntu)/)
+[Debian/Ubuntu](http://docs.librenms.org/Installation/Installation-Ubuntu-1404-Apache/)
 
-[RHEL/CentOS](http://docs.librenms.org/Installation/Installation-(RHEL-CentOS)/
+[RHEL/CentOS](http://docs.librenms.org/Installation/Installation-CentOS-6-Apache-Nginx/
 
-[Debian/Ubuntu Lighttpd](http://docs.librenms.org/Installation/Installation-Lighttpd-(Debian-Ubuntu)/)
+[Debian/Ubuntu Lighttpd](http://docs.librenms.org/Installation/Installation-Ubuntu-1404-Lighttpd/)
 
-[Debian/Ubuntu Nginx](http://docs.librenms.org/Installation/Installation-Nginx-(Debian-Ubuntu)/)
+[Debian/Ubuntu Nginx](http://docs.librenms.org/Installation/Installation-Ubuntu-1404-Nginx/)