Diff of PubSubHubbub

• The added line is THIS COLOR.
• The deleted line is THIS COLOR.
• Go to PubSubHubbub.

-  PubSubHubbubとは
--  https://unoh.github.io/2009/08/19/what-is-pubsubhubbub.html

- [[WebSub]]

* 応用 [#o1909a94]

- [[OStatus]]
- [[Mastodon]]