[v9_9] isc_errno_toresult()

4445.	[cleanup]	isc_errno_toresult() can now be used to call the
			formerly private function isc__errno2result().
			[RT #43050]

(cherry picked from commit ddef16e1d9)

bin/tests/system/checkconf/good.conf

@@ -131,3 +131,12 @@ key "mykey" {
 	algorithm "hmac-md5";
 	secret "qwertyuiopasdfgh";
 };
+dyndb "name" "library.so" {
+        this;
+        \};
+        is a {
+                "test" { \{ of; the; };
+        } bracketed;
+        "text \"";
+        system;
+};