* Import some stuff from service_identity directly.
* Extract _log_tls().
* Sync validating IP addresses.
* Introduce _deps_compat.
* Deprecate getCertificateOptions().
* Deprecate ScrapyClientTLSOptions.
* Add pragma: no cover.
* verify=False and trustRoot=platformTrust() are the defaults.
* Improve docstrings for TLS classes.
* Deprecate AcceptableProtocolsContextFactory.
* Switch from DefaultOpenSSLContextFactory to CertificateOptions.
* Deprecate load_context_factory_from_settings().
* Remove the outdated warning about incompatible factories.
* Simplify _load_context_factory_from_settings().
* Make CertificateOptions and Context once per factory.
* pragma: no cover