Fix PHPDoc in /apps

apps/files/lib/helper.php

apps/files_encryption/hooks/hooks.php

apps/files_encryption/lib/crypt.php

apps/files_encryption/lib/helper.php

apps/files_encryption/lib/keymanager.php

apps/files_encryption/lib/proxy.php

apps/files_encryption/lib/session.php

apps/files_encryption/lib/stream.php

apps/files_encryption/lib/util.php

apps/files_encryption/tests/crypt.php

apps/files_encryption/tests/util.php

apps/files_external/lib/config.php

apps/files_external/lib/dropbox.php

apps/files_sharing/lib/api.php

apps/files_sharing/tests/base.php

apps/files_trashbin/lib/trashbin.php

apps/files_versions/lib/versions.php

apps/user_ldap/group_ldap.php

apps/user_ldap/group_proxy.php

apps/user_ldap/lib/access.php