Make the coordinate APIs thread-safe
Make the coordinate APIs thread-safe

mapuri/serf,mapuri/serf,hashicorp/serf,mapuri/serf,pmenglund/serf,mapuri/serf,pmenglund/serf,mapuri/serf,hashicorp/serf,pmenglund/serf,mapuri/serf,hashicorp/serf,pmenglund/serf,hashicorp/serf,pmenglund/serf,hashicorp/serf,pmenglund/serf