2.23.0 (stable): Major changes since 2.22: * Allow separate and multi-threaded libxml2 usage by not using the global xmlRegisterNodeDefault() and xmlDeregisterNodeDefault() callbacks. (Alessandro Pignotti) * Do not call xmlCleanupParser() when the library is unloaded, because it is brutal and can break other parts of applications that try to use libxml separately. (Murray Cumming)