doc: fix asynchronous-answers default value

doc/reference.rst

@@ -159,7 +159,7 @@ When asynchronous startup is enabled, server doesn't wait for the zones to be lo
 starts responding immediately lame answers until the zone loads. This may be useful in
 some scenarios, but it is disabled by default.
 
-Default: disabled (wait for zones to be loaded before answering)
+Default value: ``off`` (wait for zones to be loaded before answering)
 
 ::
 

man/knot.conf.5.in

@@ -58,7 +58,7 @@ serves as an example of the configuration for knotc(8) and knotd(8).
   # When asynchronous startup is enabled, server doesn't wait for the zones to be loaded, and
   # starts responding immediately lame answers until the zone loads. This may be useful in
   # some scenarios, but it is disabled by default.
-  # Default: disabled (wait for zones to be loaded before answering)
+  # Default: off (wait for zones to be loaded before answering)
   asynchronous-start off;
 
   # User for running server