fix dead links

Signed-off-by: Pau Ruiz Safont <[email protected]>

Author: psafont

xen-api/overview.md

@@ -303,10 +303,10 @@ In this chapter we have presented a brief high-level overview of the API and its
 
 There are a number of places you can find more information:
 
--   The [XenServer Administrators Guide](http://docs.vmd.citrix.com/XenServer/6.5.0/1.0/en_gb/reference.html) contains an overview of the `xe`
+-   The [XenServer Administrators Guide](https://docs.citrix.com/en-us/citrix-hypervisor/command-line-interface.html) contains an overview of the `xe`
     1.  Since a good deal of `xe` commands are a thin veneer over the API, playing with `xe` is a good way to start finding your way around the API object model described in this chapter.
 -   The code samples in the next chapter provide some concrete instances of API coding in a variety of client languages.
 
--   The [XenServer API Reference](http://docs.vmd.citrix.com/XenServer/6.5.0/1.0/en_gb/api/) reference document provides a more detailed description of the API semantics as well as describing the format of XML/RPC messages on the wire.
+-   The [XenServer API Reference](https://developer-docs.citrix.com/projects/citrix-hypervisor-management-api/en/latest/) reference document provides a more detailed description of the API semantics as well as describing the format of XML/RPC messages on the wire.
 
 -   There are a few scripts that use the API in the XenServer Host dom0 itself. For example, "/opt/xensource/libexec/shutdown" is a python program that cleanly shuts VMs down. This script is invoked when the host itself is shut down.

xen-api/usage.md

@@ -358,7 +358,8 @@ Besides using raw XML-RPC or one of the supplied language bindings, third-party
 |Binary:|xe (xe.exe on Windows)|
 |Dependencies:|None|
 
-The CLI allows almost every API call to be directly invoked from a script or other program, silently taking care of the required session management. The XE CLI syntax and capabilities are described in detail in the [XenServer Administrator's Guide](http://docs.vmd.citrix.com/XenServer/6.5.0/1.0/en_gb/reference.html). For additional resources and examples, visit the [Citrix Knowledge Center](http://support.citrix.com).
+The CLI allows almost every API call to be directly invoked from a script or other program, silently taking care of the required session management.
+The XE CLI syntax and capabilities are described in detail in the [XenServer Administrator's Guide](https://docs.citrix.com/en-us/citrix-hypervisor/command-line-interface.html). For additional resources and examples, visit the [Citrix Knowledge Center](http://support.citrix.com).
 
 > **Note**
 >