doc: Extend dirmngr's --allow-version-check description

--

doc/dirmngr.texi

@@ -264,7 +264,13 @@ the list of current software versions.  If this option is enabled, or
 if @option{use-tor} is active, the list is retrieved when the local
 copy does not exist or is older than 5 to 7 days.  See the option
 @option{--query-swdb} of the command @command{gpgconf} for more
-details.
+details.  Note, that regardless of this option a version check can
+always be triggered using this command:
+
+@example
+       gpg-connect-agent --dirmngr 'loadswdb --force' /bye
+@end example
+
 
 @item --keyserver @var{name}
 @opindex keyserver