2.2 (2014-03-05)
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* When `CheckForUpdate()` is called a second time, while an auto-download is
in progress, but after the first check is complete, we send an
`UpdateAvailableStatus` signal with the cached information. (LP: #1284217)
* Close a race condition when manually downloading and issuing multiple
`CheckForUpdate` calls. (LP: #1287919)
* Support disabling either the HTTP or HTTPS services for update (but not
both). The ``[service]http_port`` or ``[service]https_port`` may be set to
the string ``disabled`` and the disabled protocol will fall back to the
enabled protocol. Implementation given by Vojtech Bocek. (LP: #1278589)
* Allow the channel.ini file to override the ``[service]`` section.
* Now that ubuntu-download-manager performs atom...