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

fusl/src/network/inet_legacy.c

Index: fusl/src/network/inet_legacy.c
diff --git a/fusl/src/network/inet_legacy.c b/fusl/src/network/inet_legacy.c
new file mode 100644
index 0000000000000000000000000000000000000000..621b47b05086d98843a71b6b2a4589ef9238fb17
--- /dev/null
+++ b/fusl/src/network/inet_legacy.c
@@ -0,0 +1,32 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+in_addr_t inet_network(const char *p)
+{
+	return ntohl(inet_addr(p));
+}
+
+struct in_addr inet_makeaddr(in_addr_t n, in_addr_t h)
+{
+	if (n < 256) h |= n<<24;
+	else if (n < 65536) h |= n<<16;
+	else h |= n<<8;
+	return (struct in_addr){ h };
+}
+
+in_addr_t inet_lnaof(struct in_addr in)
+{
+	uint32_t h = in.s_addr;
+	if (h>>24 < 128) return h & 0xffffff;
+	if (h>>24 < 192) return h & 0xffff;
+	return h & 0xff;
+}
+
+in_addr_t inet_netof(struct in_addr in)
+{
+	uint32_t h = in.s_addr;
+	if (h>>24 < 128) return h >> 24;
+	if (h>>24 < 192) return h >> 16;
+	return h >> 8;
+}