Plugin Explanation:
  - Credits
  - intents
  - use
  
Plugin Limitations:
  - where you should stop thinking about a plugin

Plugin Caveats:
 - things that will make life painful for you


- slots and hooks
- conduit
- API Dependencies
- plugin types


New plugin:
 nscd plugin
  1.  v disable nscd before running
      v enable after running

  2.  v check to see if useradd is needed by the packages, only then 
      disable nscd
  
  3.  v add a command line option to yum to support this
  
  4.  v check the return value from the nscd disabling to determine 
        whether or not yum should continue

  5.  v setup config options for enabling/disabling nscd and the dep to
        check for