vlib/net: add buffered IO, x.net -> net (#6754)

vlib/net/socket_options.c.v

@@ -0,0 +1,55 @@
+module net
+
+enum SocketOption {
+	// TODO: SO_ACCEPT_CONN is not here becuase windows doesnt support it
+	// and there is no easy way to define it
+
+	broadcast = C.SO_BROADCAST
+	debug = C.SO_DEBUG
+	dont_route = C.SO_DONTROUTE
+	error = C.SO_ERROR
+	keep_alive = C.SO_KEEPALIVE
+	linger = C.SO_LINGER
+	oob_inline = C.SO_OOBINLINE
+
+	reuse_addr = C.SO_REUSEADDR
+
+	recieve_buf_size = C.SO_RCVBUF
+	recieve_low_size = C.SO_RCVLOWAT
+	recieve_timeout = C.SO_RCVTIMEO
+
+	send_buf_size = C.SO_SNDBUF
+	send_low_size = C.SO_SNDLOWAT
+	send_timeout = C.SO_SNDTIMEO
+
+	socket_type = C.SO_TYPE
+}
+
+const (
+	opts_bool = [SocketOption.broadcast, .debug, .dont_route, .error, .keep_alive, .oob_inline]
+	opts_int = [
+		.recieve_buf_size, 
+		.recieve_low_size, 
+		.recieve_timeout,
+		
+		.send_buf_size,
+		.send_low_size,
+		.send_timeout,
+	]
+
+	opts_can_set = [
+		SocketOption.broadcast,
+		.debug, 
+		.dont_route, 
+		.keep_alive, 
+		.linger, 
+		.oob_inline, 
+		.recieve_buf_size, 
+		.recieve_low_size, 
+		.recieve_timeout,
+		
+		.send_buf_size,
+		.send_low_size,
+		.send_timeout,
+	]
+)