Urls can now be claimed by remotes. This will allow creating, for example, a external special remote that handles magnet: and *.torrent urls.

Remote/Ddar.hs

@@ -72,6 +72,7 @@ gen r u c gc = do
 		, mkUnavailable = return Nothing
 		, getInfo = return [("repo", ddarrepo)]
 		, claimUrl = Nothing
+		, checkUrl = const $ return Nothing
 		}
 	ddarrepo = fromMaybe (error "missing ddarrepo") $ remoteAnnexDdarRepo gc
 	specialcfg = (specialRemoteCfg c)