examples/explain release notes.

[Wheeler, John]

Mark,

can you help me understand what the following is for or how I can use
them with some simple examples:

        Variables can override context using a dot notation:

          ${context.variable}  ${global.env_time}

        Interface addresses on multiple interfaces:

          ${global.ipv4[hme0]} 
          ${global.ipv4[eth1]}


This is from your change log:
http://www.iu.hio.no/cfengine/src-mirror/ChangeLog.txt