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

fusl/src/network/hstrerror.c

Index: fusl/src/network/hstrerror.c
diff --git a/fusl/src/network/hstrerror.c b/fusl/src/network/hstrerror.c
new file mode 100644
index 0000000000000000000000000000000000000000..a4d001c53410a0faeee07d5e7e93ec62a917d027
--- /dev/null
+++ b/fusl/src/network/hstrerror.c
@@ -0,0 +1,18 @@
+#define _GNU_SOURCE
+#include <netdb.h>
+#include "locale_impl.h"
+
+static const char msgs[] =
+	"Host not found\0"
+	"Try again\0"
+	"Non-recoverable error\0"
+	"Address not available\0"
+	"\0Unknown error";
+
+const char *hstrerror(int ecode)
+{
+	const char *s;
+	for (s=msgs, ecode--; ecode && *s; ecode--, s++) for (; *s; s++);
+	if (!*s) s++;
+	return LCTRANS_CUR(s);
+}