avoid warning when symlink in the repo contains a colon but is not a

pointer to annexed content

Backend.hs

@@ -137,7 +137,8 @@ lookupFile file = do
 		makekey bs l = do
 			case maybeLookupBackendName bs bname of
 				Nothing -> do
-					unless (null kname || null bname) $
+					unless (null kname || null bname ||
+					        not (isLinkToAnnex l)) $
 						warning skip
 					return Nothing
 				Just backend -> return $ Just (k, backend)

Locations.hs

@@ -15,6 +15,7 @@ module Locations (
 	annexTmpLocation,
 	annexBadLocation,
 	annexUnusedLog,
+	isLinkToAnnex,
 	annexDir,
 	annexObjectDir,
 
@@ -22,6 +23,7 @@ module Locations (
 ) where
 
 import Data.String.Utils
+import Data.List
 
 import Types
 import qualified GitRepo as Git
@@ -69,6 +71,10 @@ annexBadLocation r = annexDir r ++ "/bad/"
 annexUnusedLog :: Git.Repo -> FilePath
 annexUnusedLog r = annexDir r ++ "/unused"
 
+{- Checks a symlink target to see if it appears to point to annexed content. -}
+isLinkToAnnex :: FilePath -> Bool
+isLinkToAnnex s = isInfixOf "/.git/annex/objects/" s
+
 {- Converts a key into a filename fragment.
  -
  - Escape "/" in the key name, to keep a flat tree of files and avoid