TLS support for THttpServer

[achechulin]

Initial TLS support.
Tested on Windows 10 (SSPI and OpenSSL 3.0.3), and in Ubuntu 22.04 (OpenSSL 3.0.3).
How to use:

fHttpServer := THttpServer.Create('443', nil, nil, '', 32, 30000, [hsoEnableTls]);
fHttpServer.WaitStarted; // raise exception e.g. on binding issue
fHttpServer.Sock.TLS.CertificateFile := 'cert.pem'; // cert.pfx for SSPI
fHttpServer.Sock.TLS.PrivateKeyFile := 'privkey.pem';

[synopse]

Really great integration!

[synopse]

I will try to implement it on the async server too.

[achechulin]

Before, I looked at the NGINX source - async is much more complicated.

[synopse]

my idea is to switch to synchronous/blocking socket mode for the TLS code