Add an unsigned int/string pair type, modelled on the value string of

wireshark

test/test_runner.c

@@ -29,6 +29,7 @@ extern Suite *ratelimit_suite(void);
 extern Suite *htable_suite(void);
 extern Suite *heapsort_suite(void);
 extern Suite *dstr_suite(void);
+extern Suite *val_str_suite(void);
 
 static suite_func suites[] = {
     bitvec_suite,
@@ -52,7 +53,8 @@ static suite_func suites[] = {
     clock_suite,
     threadqueue_suite,
     heapsort_suite,
-    dstr_suite
+    dstr_suite,
+    val_str_suite
 };
 
 int