remove uuid from url when calling git credential

The user doesn't want to see a uuid in the prompt.

Also, when a http server is proxying, multiple remotes will have the
same base url, and the same password will work for them all.

P2P/Http/Url.hs

@@ -88,3 +88,6 @@ parseP2PHttpUrl us
 			, baseUrlPort = port
 			}
 #endif
+
+p2pHttpUrlWithoutUUID :: String -> String
+p2pHttpUrlWithoutUUID = reverse . dropWhile (/= '/') . reverse