[mirror-admin] MirrorManager only returns one URL for EPEL repos

[Columbia University Mirror Admins]

My local/I2-only mirror is registered for our netblocks in  
MirrorManager.  When I query for a mirrorlist from my netblock,  
MirrorManager correctly returns my mirror at the top of the list.   
However, it's been brought to my attention that when querying for the  
EPEL 5 mirrorlist, only my mirror is returned.  I notice this is also  
the case for the Fedora 7 repo, but the Fedora 8 repo & above return  
multiple URLs with my mirror at the top for my netblocks.  Is this a  
bug in MirrorManager or did old versions of yum not support multiple  
URLs in a mirrorlist?  If the latter, where in the MirrorManager code  
is the number of URLs to return controlled.  I briefly tried searching  
the code, but couldn't find anything.

Thanks,
Dave Coulthart

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