anchor.diff:  Localhost or numerical IP addresses are currently NOT marked as suspicious.
   
   Please comment in case you have additional requirements.
  +
  +Use checkerClass _BrokenHttpLinksChecker_.
   
   === Other types of external links
   *planned*: ftp, ntp or other protocols are currently not checked,
  
positive.code: 
  In this example, the bookmark is _misspelled_.
  
  
  === Missing Images Files
  Images, referenced in '<img src="XYZ"...' tags, refer to external files. The existence of
  these files is checked by the plugin.
  
  === Multiple Definitions of Bookmarks or ID's
  If any is defined more than once, any anchor linking to it will be confused :-)
  
  === Missing Local Resources
  All files (e.g. downloads) referenced from html.
  
  === Missing Alt-tags in Images
  Image-tags should contain an alt-attribute that the browser displays when the original image
  file cannot be found or cannot be rendered. Having alt-attributes is good and defensive style.
  
  
  === Broken HTTP Links
  The current version (derived from branch 1.0.0-RC-2) contains a simple
  
negative.code:     // httpSuccessCodes
  
      // only execute a subset of all available checks
      // available checker:
      //   * BrokenCrossReferencesChecker
      //   * BrokenHttpLinksChecker
      //   * DuplicateIdChecker
      //   * ImageMapChecker
      //   * MissingAltInImageTagsChecker
      //   * MissingImageFilesChecker
      //   * MissingLocalResourcesChecker
      checkerClasses = [DuplicateIdChecker, MissingImageFilesChecker]
  }
  
  ----
  