Nodes APIs: All node APIs to allow to match on nodes based on addresses, names, and attributes

[kimchy]

Address:

curl localhost:9200/_cluster/nodes/10.0.0.3,10.0.0.4
curl localhost:9200/_cluster/nodes/10.0.0.*

Names:

curl localhost:9200/_cluster/nodes/node_name_goes_here
curl localhost:9200/_cluster/nodes/node_name_goes_*

Attributes:

In the config, add something like node.rack: 2, and then:

curl localhost:9200/_cluster/nodes/rack:2
curl localhost:9200/_cluster/nodes/ra*:2
curl localhost:9200/_cluster/nodes/ra*:2*