Sped up query commands that read the git-annex branch by around 5%

The only price paid is one additional MVar read per write to the journal.
Presumably writing a journal file dominiates over a MVar read time by
several orders of magnitude.

--batch does not get the speedup because then it needs to notice when
another process has made a change. Also made the assistant and other damon
modes bypass the optimisation, which would not help them anyway.

RemoteDaemon/Core.hs

@@ -22,6 +22,7 @@ import Utility.SimpleProtocol
 import Utility.ThreadScheduler
 import Config
 import Annex.Ssh
+import Annex.BranchState
 import Types.Messages
 
 import Control.Concurrent
@@ -163,7 +164,9 @@ genTransportHandle = do
 	annexstate <- newMVar =<< Annex.new =<< Git.CurrentRepo.get
 	g <- Annex.repo <$> readMVar annexstate
 	let h = TransportHandle (LocalRepo g) annexstate
-	liftAnnex h $ Annex.setOutput QuietOutput
+	liftAnnex h $ do
+		Annex.setOutput QuietOutput
+		enableInteractiveJournalAccess
 	return h
 
 updateTransportHandle :: TransportHandle -> IO TransportHandle