* Fix extension hook for updated articles https://github.com/FreshRSS/FreshRSS/issues/1926 * Enable extensions during PubSubHubbub * A little array protection * Changelog 1926 https://github.com/FreshRSS/FreshRSS/issues/1926 https://github.com/FreshRSS/FreshRSS/pull/1932 * Add null check