add initial pass of window.analytics q

Author: forstisabella

src/connections/sources/custom-domain.md

@@ -84,4 +84,9 @@ Segment does not recommended that you change the subdomain after the initial set
 ### Who is responsible for managing the SSL certificate for the Custom Domain?
 Segment hosts and manages SSL Certificate on the Custom Domain. At this time, Segment does not support importing a certificate you may already have, as Segment must request a SSL certificate on your behalf using AWS Certificate Manager (ACM) when initially setting up your Custom Domain. 
 
-Segment also uses AWS Certificate Manager (ACM) to manage and renew certificates.
+Segment also uses AWS Certificate Manager (ACM) to manage and renew certificates.
+
+### Can you rename `window.analytics` with Custom Domain?
+Yes, Custom Domain allows Segment to rename `window.analytics` to a unique name to avoid being blocked by certain ad blocking software. 
+
+Customers who have access to the Custom Domain feature can rename analytics to `<workspaceid>/<sourceid>.js` by choosing an Alias for analytics.js within the source settings that will be available after the workspace is enabled for Custom Domain: