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

fusl/src/network/recvfrom.c

Index: fusl/src/network/recvfrom.c
diff --git a/fusl/src/network/recvfrom.c b/fusl/src/network/recvfrom.c
new file mode 100644
index 0000000000000000000000000000000000000000..436f3447cfb8782c0ea6a8fa63e1f56ecdae472d
--- /dev/null
+++ b/fusl/src/network/recvfrom.c
@@ -0,0 +1,8 @@
+#include <sys/socket.h>
+#include "syscall.h"
+#include "libc.h"
+
+ssize_t recvfrom(int fd, void *restrict buf, size_t len, int flags, struct sockaddr *restrict addr, socklen_t *restrict alen)
+{
+	return socketcall_cp(recvfrom, fd, buf, len, flags, addr, alen);
+}