Merge pull request #4790 from nextcloud/fix-comparisons-in-apps

apps/dav/lib/CalDAV/CalDavBackend.php

apps/dav/lib/CalDAV/Search/SearchPlugin.php

apps/dav/lib/CardDAV/CardDavBackend.php

apps/dav/lib/Connector/Sabre/Directory.php

apps/dav/lib/Connector/Sabre/File.php

apps/dav/lib/Connector/Sabre/ObjectTree.php

apps/dav/lib/DAV/Sharing/Backend.php

apps/encryption/lib/Crypto/Crypt.php

apps/encryption/lib/Crypto/Encryption.php

apps/files/ajax/download.php

apps/files/lib/Helper.php

apps/files/lib/Settings/Admin.php

apps/files_external/ajax/oauth2.php

apps/files_external/lib/Command/Import.php

apps/files_external/lib/Lib/Storage/Dropbox.php

apps/files_external/lib/Lib/Storage/FTP.php

apps/files_external/lib/Lib/Storage/OwnCloud.php

apps/files_external/lib/Lib/Storage/SFTP.php

apps/files_external/lib/Lib/Storage/SMB.php

apps/files_external/lib/Lib/Storage/Swift.php