propigate ssh-options everywhere ssh caching is used

* sync: Use the ssh-options git config when doing git pull and push.
* remotedaemon: Use the ssh-options git config.

Note that the rename env var means that if a new git-annex calls an old one
for git-annex ssh, or a new calls an old, nothing much will go wrong;
just ssh caching won't happen.

CmdLine/GitAnnex.hs

@@ -218,6 +218,6 @@ run args = do
 	go [] = dispatch True args cmds gitAnnexOptions [] header Git.CurrentRepo.get
 	go ((v, a):rest) = maybe (go rest) a =<< getEnv v
 	envmodes =
-		[ (sshCachingEnv, runSshCaching args)
+		[ (sshOptionsEnv, runSshOptions args)
 		, (sshAskPassEnv, runSshAskPass)
 		]