generate the plugin_id based upon the name (for ease of making the plugin optional)

(e.g. "File=/dev/nvidia[0-3]")

  internal consistency of select/cons_res data structures if the node
  count of a system changes

cpu count array have one element per node

    not specified by the user will be reported as "*" instead of 65534.

    Plugin API

in gres logic, permit gres.conf to have CPUs defined for only some of the records for a particular gres type 

    changing some variable names in version 2.2.0.pre5.

    avoid duplicate entries.