headers: add Delivered-To check
karma: 2 changes:

* apply awards before adding message header (so the Header value has data_post
  awards shown)
* permit karma to rejecting during queue hook
* rename config_data -> cfg (concise, and that's

the convention we're using elsewhere (especially in plugins)
Merge pull request #730 from msimerson/server

rename config_data -> cfg (concise, and that's
Merge pull request #728 from msimerson/headers

headers: add Delivered-To check
Merge pull request #729 from msimerson/karma

karma: 2 changes:
TODO: added HARAKA_NETWORK_TESTS item