.hgignore: add vendor tree composer.json: new packages plugins/thunderbird_labels/thunderbird_labels.php: change hook and RFC822 use wrt whitelisting to avoid deprecated stuff index.php: commented debugging hooks others: new releases of vendor packages?

-- Updates from version 0.8

ALTER TABLE `cache` DROP COLUMN `cache_id`;
ALTER TABLE `users` DROP COLUMN `alias`;
ALTER TABLE `identities` ADD INDEX `email_identities_index` (`email`, `del`);