Fix: sbd-inquisitor: fail startup if pacemaker integration is disable…

…d while SBD_SYNC_RESOURCE_STARTUP is conflicting

And tell user to fix the configuration by either enabling SBD_PACEMAKER
or explicitly disabling SBD_SYNC_RESOURCE_STARTUP. Otherwise startup of
pacemaker would be hanging forever, since pacemaker only knows about
SBD_SYNC_RESOURCE_STARTUP.

src/sbd-inquisitor.c

@@ -1293,6 +1293,12 @@ int main(int argc, char **argv, char **envp)
             cl_log(LOG_WARNING, "SBD built against pacemaker supporting "
                              "pacemakerd-API. Should think about enabling "
                              "SBD_SYNC_RESOURCE_STARTUP.");
+
+        } else if (!check_pcmk && sync_resource_startup) {
+            fprintf(stderr, "Set SBD_PACEMAKER=yes to allow resource startup syncing. "
+                    "Otherwise explicitly set SBD_SYNC_RESOURCE_STARTUP=no if to intentionally disable.\n");
+            exit_status = -1;
+            goto out;
         }
 #endif
     }