sync, assistant: Sync with remotes that have annex-ignore set

This is so git remotes on servers without git-annex installed can be used
to keep clients' git repos in sync.

This is a behavior change, but since annex-sync can be set to disable
syncing with a remote, I think it's acceptable.

Assistant/Threads/MountWatcher.hs

@@ -157,7 +157,7 @@ handleMount :: FilePath -> Assistant ()
 handleMount dir = do
 	debug ["detected mount of", dir]
 	rs <- filter (Git.repoIsLocal . Remote.repo) <$> remotesUnder dir
-	reconnectRemotes True $ filter (not . remoteAnnexIgnore . Remote.gitconfig) rs
+	reconnectRemotes True rs
 
 {- Finds remotes located underneath the mount point.
  -