[whatwg] Clarifications needed in "application cache selection algorithm" section

[Anders Carlsson]

"If there is already an application cache identified by this manifest  
URI, and that application cache contains a resource with the URI of  
the manifest, and that resource is categorised as a manifest, then:  
store the resource in the matching cache with the most up to date  
version, categorised as an implicit entry, associate the Document with  
that cache, invoke the application cache update process, and abort  
these steps."

as well as

"If there is already an application cache identified by this manifest  
URI, then that application cache does not yet contain a resource with  
the URI of the manifest, or it does but that resource is not yet  
categorised as a manifest: store the resource in that cache,  
categorised as an implicit entry (replacing the file's previous  
contents if it was already in the cache, but not removing any other  
categories it might have), and abort these steps."

need to clarify that the cache needs to be the most recently updated  
cache in the group.

Anders