x.net: new net module (#6130)

vlib/x/net/net_nix.c.v

@@ -0,0 +1,28 @@
+module net
+
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/select.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <errno.h>
+#include <fcntl.h>
+
+fn error_code() int {
+	return C.errno
+}
+
+fn init() {
+}
+
+pub const (
+	msg_nosignal = 0x4000
+)
+
+const (
+	error_ewouldblock = C.EWOULDBLOCK
+)
+
+#flag solaris -lsocket