added some other network builtins

samples/client.noja

@@ -0,0 +1,26 @@
+
+port = 8080;
+addr = "127.0.0.1";
+
+fd = net.socket(net.AF_INET, net.SOCK_STREAM, 0);
+
+if fd < 0:
+	{
+		print('Failed to create socket.\n');
+		return none;
+	}
+
+sin_addr = {};
+if net.inet_aton(addr, sin_addr) == 0:
+	{
+		print('Bad address string format.\n');
+		return none;
+	}
+
+if net.connect(fd, { sin_family: net.AF_INET, sin_port: net.htons(port), sin_addr: sin_addr }) != 0:
+	{
+		print('Failed to connect.\n');
+		return none;
+	}
+
+print('Connected!\n');