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Description of problem: Jabberd2 2.4.0 supports websockets (https://en.wikipedia.org/wiki/WebSocket), but it seems it has to be specifically switched on (./configure --help suggests it is switched off per default).
Thanks for pointing that out. I added the necessary BuildRequires some time ago, but I never enabled it. http://koji.fedoraproject.org/koji/taskinfo?taskID=15934499