Fix leftover hcc-docs URLs.

content/_index.md

@@ -40,10 +40,8 @@ than 16 cores per node or large memory, Tusker would be a better option.
 User Login
 ----------
 
-For Windows users, please refer to this link [For Windows
-Users](https://hcc-docs.unl.edu/display/HCCDOC/For+Windows+Users). For
-Mac or Linux users, please refer to this link [For Mac/Linux
-Users](https://hcc-docs.unl.edu/pages/viewpage.action?pageId=2851290).
+For Windows users, please refer to this link [For Windows Users]({{< relref "for_windows_users" >}}).
+For Mac or Linux users, please refer to this link [For Mac/Linux Users]({{< relref "for_maclinux_users">}}).
 
 **Logging into Crane or Tusker**
 
@@ -58,8 +56,7 @@ Duo Security
 
 Duo two-factor authentication is **required** for access to HCC
 resources. Registration and usage of Duo security can be found in this
-section: [Setting up and using
-Duo](https://hcc-docs.unl.edu/display/HCCDOC/Setting+up+and+using+Duo)
+section: [Setting up and using Duo]({{< relref "setting_up_and_using_duo">}})
 
 **Important Notes**