ensure that git-annex branch is pushed after a successful transfer

I now have this topology working:

   assistant ---> {bare repo, special remote} <--- assistant

And, I think, also this one:

        +----------- bare repo --------+
        v                              v
  assistant ---> special remote <--- assistant

While before with assistant <---> assistant connections, both sides got
location info updated after a transfer, in this topology, the bare repo
*might* get its location info updated, but the other assistant has no way to
know that it did. And a special remote doesn't record location info,
so transfers to it won't propigate out location log changes at all.

So, for these to work, after a transfer succeeds, the git-annex branch
needs to be pushed. This is done by recording a synthetic commit has
occurred, which lets the pusher handle pushing out the change (which will
include actually committing any still journalled changes to the git-annex
branch).

Of course, this means rather a lot more syncing action than happened
before. At least the pusher bundles together very close together pushes,
somewhat. Currently it just waits 2 seconds between each push.

Assistant/Threads/ConfigMonitor.hs

@@ -24,7 +24,6 @@ import qualified Git.LsTree as LsTree
 import qualified Annex.Branch
 import qualified Annex
 
-import Data.Time.Clock
 import qualified Data.Set as S
 
 thisThread :: ThreadName
@@ -56,8 +55,7 @@ configMonitorThread st dstatus branchhandle commitchan = thread $ do
 				reloadConfigs st dstatus changedconfigs
 				{- Record a commit to get this config
 				 - change pushed out to remotes. -}
-				time <- getCurrentTime
-				recordCommit commitchan (Commit time)
+				recordCommit commitchan
 			go r new
 
 {- Config files, and their checksums. -}