[Pulp-list] Enable/Disable Repository Publishing

[John Matthews]

Please take a look at the below Wiki for thoughts on implementing 
"Repository Publishing".
https://fedorahosted.org/pulp/wiki/RepositoryPublishing

The intent of this feature is to enable/disable publishing of a 
repository through Apache.  If a repo is 'published', then it is 
available through Apache.  If it is not published it won't be available 
through Apache.

I'd like some input for what the team thinks would be good for actually 
implementing the logic for enable/disable.  We came up with two thoughts:
  1) Add logic to the PythonAuthenHandler to lookup the publish flag 
from mongo for each request
  2) Manipulate symbolic links under the directory serving content

Thanks,
John