conf.c: Fix stopping scheduler on unknown directive

Change the return value to do not trigger stopping the scheduler in case of unknown directive, because stopping the scheduler on config errors should only happen in case of syntax errors.

Author: zdohnal

scheduler/conf.c

@@ -2772,16 +2772,16 @@ parse_variable(
   {
    /*
     * Unknown directive!  Output an error message and continue...
+    *
+    * Return value 1 is on purpose - we ignore unknown directives to log
+    * error, but do not stop the scheduler in case error in configuration
+    * is set to be fatal.
     */
 
-    if (!value)
-      cupsdLogMessage(CUPSD_LOG_ERROR, "Missing value for %s on line %d of %s.",
-		      line, linenum, filename);
-    else
-      cupsdLogMessage(CUPSD_LOG_ERROR, "Unknown directive %s on line %d of %s.",
-		      line, linenum, filename);
+    cupsdLogMessage(CUPSD_LOG_ERROR, "Unknown directive %s on line %d of %s.",
+		    line, linenum, filename);
 
-    return (0);
+    return (1);
   }
 
   switch (var->type)