Merge remote-tracking branch 'upstream/master'

README

_test/phpunit.xml

_test/tests/inc/auth_password.test.php

_test/tests/inc/indexer_rename.test.php

_test/tests/inc/search/search.test.php

_test/tests/inc/subscription.test.php

_test/tests/inc/subscription_set.test.php

feed.php

inc/PassHash.class.php

inc/RemoteAPICore.php

inc/Tar.class.php

inc/actions.php

inc/auth.php

inc/changelog.php

inc/common.php

inc/html.php

inc/indexer.php

inc/lang/ar/subscr_single.txt

inc/lang/bg/subscr_single.txt

inc/lang/ca/lang.php