Add a "fork" of musl as //fusl.

fusl/src/network/sendto.c

Index: fusl/src/network/sendto.c
diff --git a/fusl/src/network/sendto.c b/fusl/src/network/sendto.c
new file mode 100644
index 0000000000000000000000000000000000000000..899eecff57befa5a920d504e8fa01ef0db1b4835
--- /dev/null
+++ b/fusl/src/network/sendto.c
@@ -0,0 +1,8 @@
+#include <sys/socket.h>
+#include "syscall.h"
+#include "libc.h"
+
+ssize_t sendto(int fd, const void *buf, size_t len, int flags, const struct sockaddr *addr, socklen_t alen)
+{
+	return socketcall_cp(sendto, fd, buf, len, flags, addr, alen);
+}