Whitespace fixes in lib

lib/appconfig.php

lib/archive.php

lib/archive/tar.php

lib/archive/zip.php

lib/backgroundjob/worker.php

lib/base.php

lib/cache.php

lib/connector/sabre/auth.php

lib/connector/sabre/directory.php

lib/connector/sabre/file.php

lib/connector/sabre/locks.php

lib/connector/sabre/node.php

lib/db.php

lib/eventsource.php

lib/filecache.php

lib/filecache/cached.php

lib/filecache/update.php

lib/fileproxy.php

lib/fileproxy/quota.php

lib/files.php