Add documentation for "min_proto_version" and "max_proto_version" SSL context options

[masakielastic]

Affected page

https://www.php.net/manual/en/context.ssl.php

Current issue

The SSL context options documentation currently does not describe the
min_proto_version and max_proto_version options.

These options were introduced in PHP 7.3, as mentioned in the migration guide:

https://www.php.net/manual/en/migration73.other-changes.php

However, they are not documented in the SSL context options page:

https://www.php.net/manual/en/context.ssl.php

Suggested improvement

min_proto_version (int)

Specifies the minimum allowed TLS protocol version for the connection.
The value should be one of the STREAM_CRYPTO_METHOD_* constants that
represent TLS versions, such as STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT or
STREAM_CRYPTO_METHOD_TLSv1_3_CLIENT.

This option can be used to prevent negotiation of older protocol versions.

max_proto_version (int)

Specifies the maximum allowed TLS protocol version for the connection.
The value should be one of the STREAM_CRYPTO_METHOD_* constants that
represent TLS versions.

Both options were added in PHP 7.3.

Additional context (optional)

No response