* federation (ap, salmon)
* media (rich media, media proxy)
* upload (uploader proxy)
Each "part" will stop fighting others ones -- a huge federation outbound
could before make the media proxy fail to checkout a connection in time.
splitted media and uploaded media for the good reason than an upload
pool will have all connections to the same host (the uploader upstream).
it also has a longer default retention period for connections.
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William Pitcock
Maxim Filippov