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

fusl/src/network/getservbyport.c

Index: fusl/src/network/getservbyport.c
diff --git a/fusl/src/network/getservbyport.c b/fusl/src/network/getservbyport.c
new file mode 100644
index 0000000000000000000000000000000000000000..c9ecbb11c869ccd1acb8a47bb039c45400870623
--- /dev/null
+++ b/fusl/src/network/getservbyport.c
@@ -0,0 +1,12 @@
+#define _GNU_SOURCE
+#include <netdb.h>
+
+struct servent *getservbyport(int port, const char *prots)
+{
+	static struct servent se;
+	static long buf[32/sizeof(long)];
+	struct servent *res;
+	if (getservbyport_r(port, prots, &se, (void *)buf, sizeof buf, &res))
+		return 0;
+	return &se;
+}