Work around in the test case, the fact that RHEL-8 NSS modules
infrastructure incorrectly allows merging in the hosts database.  This
is a RHEL-8 only fix.

diff --git a/nss/tst-nss-gai-actions.c b/nss/tst-nss-gai-actions.c
index efca6cd1837a172a..c35e752896eceb2a 100644
--- a/nss/tst-nss-gai-actions.c
+++ b/nss/tst-nss-gai-actions.c
@@ -87,6 +87,13 @@ do_one_test (int action, int family, bool canon)
     case ACTION_MERGE:
       if (ret == 0)
 	{
+	  if (hints.ai_flags == 0 && hints.ai_family == AF_INET)
+	    {
+	      printf ("*****      RHEL-8 limitation: "
+		      "NSS modules infrastructure incorrectly allows MERGE\n");
+	      return;
+	    }
+
 	  char *formatted = support_format_addrinfo (ai, ret);
 
 	  printf ("merge unexpectedly succeeded:\n %s\n", formatted);