Perform sanity check for multiple repos of the same name.

Title: Perform sanity check for multiple repos of the same name.
ID: 4160157833020b1a33d2e6b05dc12c848c891d03
Owned By: Steve Dougherty 
Filed On: Monday, August 05 2013 10:09PM

[details]
Having multiple directories associated with the same request URI means a pull
request cannot reasonably give a directory to pull to. (Or should it give all
matches?)

Having multiple repositories with the same name (in the request URI)
makes pull requests not work (because it uses only name), and makes it more
confusing to refer to repositories.

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