Add TLS/SSL support

[iggyvolz]

Is your feature request related to a problem? Please describe.
The TCP component is incapable of connecting over TLS/SSL (ex. to any HTTPS site)

Describe the solution you'd like
The simplest solution would be to add a flag to Psl\TCP\Connect which would set the protocol to tls (tls requested) or tcp (default/no tls requested) here:

psl/src/Psl/TCP/connect.php

Line 32 in 9f9ddfe

$socket = Network\Internal\socket_connect("tcp://{$host}:{$port}", $context, $timeout);

. However there are also several settings in the SSL context https://www.php.net/manual/en/context.ssl.php so I could see this going into ConnectOptions (or a separate SSLConnectOptions within ConnectOptions).

Describe alternatives you've considered
https://www.php.net/manual/en/function.stream-socket-enable-crypto.php appears to allow you to enable TLS after starting a stream, however I was not able to get it to work with HTTPS, so it looks like there's a slightly different effect of stream_context_create("tls://") vs $stream = stream_context_create("tcp://"); stream_socket_enable_crypto($stream); - this would allow you to do something like $stream->enableCrypto();.

Additional context
Running a TLS server is an entirely different beast, because that is going to require loading the certificate in (client certificates also exist but they're far less used 😢). With the complexity here it might make sense to make an entirely separate TLS-over-TCP module.

[azjezz]

I have thought about supporting TLS, however, i didn't look into it much, i will give it a go maybe next week and keep this issue updated.

[iggyvolz]

Is there anything I can do to help move this along? I could submit a PR with bc4f953 (2 line change) which has worked well for me in the past several months. It works well enough without any options, and they could potentially be added later.