Checkstyle: many fixes

apps/files/appinfo/filesync.php

apps/files/download.php

apps/files/index.php

apps/files_encryption/lib/crypt.php

apps/files_encryption/lib/cryptstream.php

apps/files_encryption/lib/proxy.php

apps/files_encryption/settings.php

apps/files_encryption/tests/encryption.php

apps/files_encryption/tests/proxy.php

apps/files_encryption/tests/stream.php

apps/files_external/lib/config.php

apps/files_external/lib/ftp.php

apps/files_external/lib/smb.php

apps/files_external/lib/streamwrapper.php

apps/files_external/lib/swift.php

apps/files_external/lib/webdav.php

apps/files_sharing/lib/sharedstorage.php

apps/files_versions/lib/hooks.php

apps/files_versions/lib/versions.php

apps/user_ldap/lib/connection.php