Fix all PHPDoc types and variable names, in /lib

lib/private/appframework/dependencyinjection/dicontainer.php

lib/private/appframework/http.php

lib/private/appframework/routing/routeconfig.php

lib/private/archive/tar.php

lib/private/avatar.php

lib/private/avatarmanager.php

lib/private/backgroundjob/joblist.php

lib/private/cache/file.php

lib/private/connector/sabre/auth.php

lib/private/connector/sabre/filesplugin.php

lib/private/connector/sabre/quotaplugin.php

lib/private/db.php

lib/private/db/connectionwrapper.php

lib/private/db/mdb2schemamanager.php

lib/private/db/mdb2schemareader.php

lib/private/defaults.php

lib/private/fileproxy.php

lib/private/files/cache/cache.php

lib/private/files/cache/scanner.php

lib/private/files/filesystem.php