Please document admin urls

[fedotxxl]

We found that weed-fs has some undocumented URLs (like /admin/, /ui/index.html, etc). Can you document it so we can correctly configure our firewall

[chrislusf]

The admin urls are subject to change. Currently for master:

if !disableHttp {
	handleStaticResources2(r)
	r.HandleFunc("/", ms.proxyToLeader(ms.uiStatusHandler))
	r.HandleFunc("/ui/index.html", ms.uiStatusHandler)
	r.HandleFunc("/dir/assign", ms.proxyToLeader(ms.guard.WhiteList(ms.dirAssignHandler)))
	r.HandleFunc("/dir/lookup", ms.proxyToLeader(ms.guard.WhiteList(ms.dirLookupHandler)))
	r.HandleFunc("/dir/status", ms.proxyToLeader(ms.guard.WhiteList(ms.dirStatusHandler)))
	r.HandleFunc("/col/delete", ms.proxyToLeader(ms.guard.WhiteList(ms.collectionDeleteHandler)))
	r.HandleFunc("/vol/grow", ms.proxyToLeader(ms.guard.WhiteList(ms.volumeGrowHandler)))
	r.HandleFunc("/vol/status", ms.proxyToLeader(ms.guard.WhiteList(ms.volumeStatusHandler)))
	r.HandleFunc("/vol/vacuum", ms.proxyToLeader(ms.guard.WhiteList(ms.volumeVacuumHandler)))
	r.HandleFunc("/submit", ms.guard.WhiteList(ms.submitFromMasterServerHandler))
	r.HandleFunc("/{fileId}", ms.proxyToLeader(ms.redirectHandler))
}

for volume servers:

	adminMux.HandleFunc("/ui/index.html", vs.uiStatusHandler)
	adminMux.HandleFunc("/status", vs.guard.WhiteList(vs.statusHandler))