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

fusl/src/network/lookup_ipliteral.c

Index: fusl/src/network/lookup_ipliteral.c
diff --git a/fusl/src/network/lookup_ipliteral.c b/fusl/src/network/lookup_ipliteral.c
new file mode 100644
index 0000000000000000000000000000000000000000..8ed14605238ef642168213508f81218f32280e1c
--- /dev/null
+++ b/fusl/src/network/lookup_ipliteral.c
@@ -0,0 +1,57 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <net/if.h>
+#include <arpa/inet.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include "lookup.h"
+
+int __inet_aton(const char *, struct in_addr *);
+
+int __lookup_ipliteral(struct address buf[static 1], const char *name, int family)
+{
+	struct in_addr a4;
+	struct in6_addr a6;
+	if (__inet_aton(name, &a4) > 0) {
+		if (family == AF_INET6) /* wrong family */
+			return EAI_NONAME;
+		memcpy(&buf[0].addr, &a4, sizeof a4);
+		buf[0].family = AF_INET;
+		buf[0].scopeid = 0;
+		return 1;
+	}
+
+	char tmp[64];
+	char *p = strchr(name, '%'), *z;
+	unsigned long long scopeid = 0;
+	if (p && p-name < 64) {
+		memcpy(tmp, name, p-name);
+		tmp[p-name] = 0;
+		name = tmp;
+	}
+
+	if (inet_pton(AF_INET6, name, &a6) <= 0)
+		return 0;
+	if (family == AF_INET) /* wrong family */
+		return EAI_NONAME;
+
+	memcpy(&buf[0].addr, &a6, sizeof a6);
+	buf[0].family = AF_INET6;
+	if (p) {
+		if (isdigit(*++p)) scopeid = strtoull(p, &z, 10);
+		else z = p-1;
+		if (*z) {
+			if (!IN6_IS_ADDR_LINKLOCAL(&a6) &&
+			    !IN6_IS_ADDR_MC_LINKLOCAL(&a6))
+				return EAI_NONAME;
+			scopeid = if_nametoindex(p);
+			if (!scopeid) return EAI_NONAME;
+		}
+		if (scopeid > UINT_MAX) return EAI_NONAME;
+	}
+	buf[0].scopeid = scopeid;
+	return 1;
+}