Typo: MASTER_SEARCH_TIEMOUT

```
$ ag MASTER_SEARCH_TIEMOUT
vshard/consts.lua
58:    MASTER_SEARCH_TIEMOUT = 5,

vshard/replicaset.lua
387:        local timeout = opts.timeout or consts.MASTER_SEARCH_TIEMOUT
649:    local const_timeout = consts.MASTER_SEARCH_TIEMOUT
```

Is it in the public API?