ADDED: Encrypted client connections in library(sockets) via new option tls/1.

Use tls(true) to negotiate an encrypted network connection via TLS.

README.md

@@ -409,6 +409,8 @@ The modules that ship with Scryer Prolog are also called
   Probabilistic predicates and random number generators.
 * [`sockets`](src/prolog/lib/sockets.pl)
   Predicates for opening and accepting TCP connections as streams.
+  TLS negotiation is performed via the option `tls(true)` in
+  `socket_client_open/3`, yielding secure encrypted connections.
 * [`crypto`](src/prolog/lib/crypto.pl)
   Cryptographically secure random numbers and hashes, HMAC-based
   key derivation (HKDF), password-based key derivation (PBKDF2),