The extractor function will handle many situations more specifically in order to provide better results.
Previously the bridge could be requested without any journal causing error 403 due to broken URL.
Fixes warning: "array_key_exists() expects parameter 2 to be array, string given in /volume1/web/rss-bridge_dev/lib/HTMLUtils.php on line 59 Warning: Invalid argument supplied for foreach() in /volume1/web/rss-bridge_dev/lib/HTMLUtils.php on line 64
Signed-off-by: Pierre Mazière <pierre.maziere@gmx.com>