New core-extensions to allow Docker volumes for third-party extensions (#2837)

* New core-extensions to allow Docker volumes for third-party extensions

#Fix https://github.com/FreshRSS/FreshRSS/issues/2650
Split our extensions directory into two:
1) Core extensions shipped with FreshRSS in ./lib/core-extensions/
2) Third-party extensions modified by end-users in ./extensions/ which
can easily be mounted as a Docker volume

* Example of Docker Compose with extensions

* Back-compatibility + fix array merge bug

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/core-extensions/Tumblr-GDPR/extension.php b/lib/core-extensions/Tumblr-GDPR/extension.php
new file mode 100644
index 000000000..83bdf2189
--- /dev/null
+++ b/lib/core-extensions/Tumblr-GDPR/extension.php
@@ -0,0 +1,13 @@
+<?php
+
+class TumblrGdprExtension extends Minz_Extension {
+	public function init() {
+		$this->registerHook('simplepie_before_init', array('TumblrGdprExtension', 'curlHook'));
+	}
+
+	public static function curlHook($simplePie, $feed) {
+		if (preg_match('#^https?://[a-zA-Z_0-9-]+.tumblr.com/#i', $feed->url())) {
+			$simplePie->set_useragent(FRESHRSS_USERAGENT . ' like Baiduspider');
+		}
+	}
+}