addurl: Better sanitization of generated filenames.

Use sanitizeFilePath rather than rolling our own sanitizer.

Command/AddUrl.hs

@@ -223,6 +223,6 @@ url2file url pathdepth pathmax = case pathdepth of
   where
 	fullurl = uriRegName auth ++ uriPath url ++ uriQuery url
 	frombits a = intercalate "/" $ a urlbits
-	urlbits = map (truncateFilePath pathmax . escape) $ filter (not . null) $ split "/" fullurl
+	urlbits = map (truncateFilePath pathmax . sanitizeFilePath) $
+		filter (not . null) $ split "/" fullurl
 	auth = fromMaybe (error $ "bad url " ++ show url) $ uriAuthority url
-	escape = replace "/" "_" . replace "?" "_"

debian/changelog

@@ -6,6 +6,7 @@ git-annex (4.20131003) UNRELEASED; urgency=low
   * watcher: Detect at startup time when there is a stale .git/lock,
     and remove it so it does not interfere with the automatic
     commits of changed files.
+  * addurl: Better sanitization of generated filenames.
 
  -- Joey Hess <joeyh@debian.org>  Thu, 03 Oct 2013 15:41:24 -0400