title: in appengine how do i get foo.cust-one.com, foo.cust-two.com etc. to point to foo.appspot.vom
body: <p>If foo is a google appengine app that can be accessed at both foo.appspot.com
  and www.mydomain.com</p>
  
  <p>How do I get various publishers to be able to access this by pointing foo.theirdomain.com to theirdomain.mydomain.com or theirdomain.foo.appsopt.com.</p>
  
  <p>One way is 
  - theirdomain needs to setup a google apps account 
  - and than install my app 
  - and than specifically note that it can be accessed at url foo.theirdomain.com 
  - and in their domain manager have foo.theirdomain.com point to ghs.google.com</p>
  
  <p>What about domains that "do not have" a google apps account. How would they be able to get foo.theirdomain.com to point to either theirdomain.mydomain.com or theirdomain.foo.appspot.com</p>