unified2: not supported message if configured

src/runmodes.c

@@ -760,6 +760,10 @@ void RunModeInitializeOutputs(void)
                     "(see https://redmine.openinfosecfoundation.org/issues/353"
                     " for an explanation)");
             continue;
+        } else if (strncmp(output->val, "unified2-", sizeof("unified2-") - 1) == 0) {
+            SCLogWarning(SC_ERR_NOT_SUPPORTED,
+                    "Unified2 is no longer supported.");
+            continue;
         } else if (strcmp(output->val, "alert-prelude") == 0) {
 #ifndef PRELUDE
             SCLogWarning(SC_ERR_NOT_SUPPORTED,