Change itop URL to fix 404

README.md

@@ -195,7 +195,7 @@
 *Configuration management database (CMDB) software.*
 
   * [i-doit](http://www.i-doit.org/) - IT Documentation and CMDB.
-  * [iTop](http://www.combodo.com/-Overview-.html) - Complete ITIL web based service management tool.
+  * [iTop](http://www.combodo.com/itop-193) - Complete ITIL web based service management tool.
   * [Ralph](https://github.com/allegro/ralph) - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks.
   * [Clusto](https://github.com/clusto/clusto) - Helps you keep track of your inventory, where it is, how it's connected, and provides an abstracted interface for interacting with the elements of the infrastructure.
   * [Collins](http://tumblr.github.io/collins/) - At Tumblr, it's the infrastructure source of truth and knowledge.