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

fusl/src/network/gai_strerror.c

Index: fusl/src/network/gai_strerror.c
diff --git a/fusl/src/network/gai_strerror.c b/fusl/src/network/gai_strerror.c
new file mode 100644
index 0000000000000000000000000000000000000000..9596580e9ffbda7a2e46465ab0f91256db5c51a9
--- /dev/null
+++ b/fusl/src/network/gai_strerror.c
@@ -0,0 +1,25 @@
+#include <netdb.h>
+#include "locale_impl.h"
+
+static const char msgs[] =
+	"Invalid flags\0"
+	"Name does not resolve\0"
+	"Try again\0"
+	"Non-recoverable error\0"
+	"Unknown error\0"
+	"Unrecognized address family or invalid length\0"
+	"Unrecognized socket type\0"
+	"Unrecognized service\0"
+	"Unknown error\0"
+	"Out of memory\0"
+	"System error\0"
+	"Overflow\0"
+	"\0Unknown error";
+
+const char *gai_strerror(int ecode)
+{
+	const char *s;
+	for (s=msgs, ecode++; ecode && *s; ecode++, s++) for (; *s; s++);
+	if (!*s) s++;
+	return LCTRANS_CUR(s);
+}