Merged revisions 54066 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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r54066 | russell | 2007-02-12 11:58:43 -0600 (Mon, 12 Feb 2007) | 4 lines

- Add the ability to register a callback to monitor state changes in an
  asynchronous dial operation.
- Rename the various references to "status" to "state" in the dial API

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@54067 65c4cc65-6c06-0410-ace0-fbb531ad65f3