- set minimal error page output on PuSH callback
- allow hub to retry ($config['ostatus']['hub_retries']), simplify internal iface a bit. Retries are pushed to end of queue but otherwise not delayed yet; makes delivery more robust to one-off transitory errors but not yet against downtime.
- actually udpate feedsub.last_update when we get a new PuSH update in
- move incoming PuSH processing to a queue handler to minimize time spent before POST return, as recommended by PuSH spec. When queues are disabled this'll still be handled immediately.
* Treat linkless feed posts as status updates; drop the "New post:" prefix and quotes on them.
* Use stable user IDs for atom/rss2 feed links instead of unstable nicknames
* Pull Atom feed preferentially when subscribing -- can now put the remote user's profile page straight into the feed subscription form and get to the right place.
* Clean up naming for push endpoints
