mbdumpconfig.escript config.dat [node <Node>]
mbdumpconfig.escript config.dat [node <Node>]

Added option to just dump info for a single node.

Change-Id: Ia600ef96aef40453c1cd0f4a8c1b1cfd5310c767
Example:
  mbdumpconfig.escript config.dat node ns_1@127.0.0.1
Reviewed-on: http://review.membase.org/5741
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

ceejatec/ns_server,ceejatec/ns_server,t3rm1n4l/ns_server,vzasade/ns_server,pavel-blagodov/ns_server,mschoch/ns_server,pavel-blagodov/ns_server,vzasade/ns_server,nimishzynga/ns_server,ceejatec/ns_server,membase/ns_server,membase/ns_server,mschoch/ns_server,t3rm1n4l/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,membase/ns_server,daverigby/ns_server,pavel-blagodov/ns_server,daverigby/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,mschoch/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,daverigby/ns_server,t3rm1n4l/ns_server,membase/ns_server,mschoch/ns_server,mschoch/ns_server,pavel-blagodov/ns_server,membase/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,ceejatec/ns_server,membase/ns_server,daverigby/ns_server,vzasade/ns_server,nimishzynga/ns_server,vzasade/ns_server,daverigby/ns_server,mschoch/ns_server