Update from 1.19.3 to 1.19.4.
Remove needless patches.

<Changelog>

*) Feature: the "ssl_conf_command", "proxy_ssl_conf_command",

"grpc_ssl_conf_command", and "uwsgi_ssl_conf_command" directives.

*) Feature: the "ssl_reject_handshake" directive.

*) Feature: the "proxy_smtp_auth" directive in mail proxy.

</Changelog>