[B<-help>]
[B<-connect host:port>]
[B<-proxy host:port>]
+[B<-unix path>]
+[B<-4>]
+[B<-6>]
[B<-servername name>]
[B<-verify depth>]
[B<-verify_return_error>]
specified with this flag and issues an HTTP CONNECT command to connect
to the desired server.
+=item B<-unix path>
+
+Connect over the specified Unix-domain socket.
+
+=item B<-4>
+
+Use IPv4 only.
+
+=item B<-6>
+
+Use IPv6 only.
+
=item B<-servername name>
Set the TLS SNI (Server Name Indication) extension in the ClientHello message.