* add /stream/info as a cheap way to subscribe to comment updates #253
* add check for lastTS change to allow proper info streams in no-cache mode
* check write error in info stream and terminate
* flaky info stream test
* add stream info to readme
* separate timeout middleware foe each route's group
* debug info on stream close
* fix test for streams
* stream timeout on inactivity only
* throttle streams to 500
* restore common throttle
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