Merge pull request #15680 from owncloud/add-since-tags-to-public-namespace

lib/public/activity/iconsumer.php

lib/public/activity/iextension.php

lib/public/activity/imanager.php

lib/public/api.php

lib/public/app.php

lib/public/app/iappmanager.php

lib/public/appframework/apicontroller.php

lib/public/appframework/app.php

lib/public/appframework/controller.php

lib/public/appframework/db/doesnotexistexception.php

lib/public/appframework/db/entity.php

lib/public/appframework/db/mapper.php

...blic/appframework/db/multipleobjectsreturnedexception.php

lib/public/appframework/http.php

lib/public/appframework/http/contentsecuritypolicy.php

lib/public/appframework/http/datadisplayresponse.php

lib/public/appframework/http/datadownloadresponse.php

lib/public/appframework/http/dataresponse.php

lib/public/appframework/http/downloadresponse.php

lib/public/appframework/http/icallbackresponse.php