Added note on newly available configuration option.

config/vufind/website.ini

@@ -26,7 +26,10 @@ linktype = "Link Type"
 subject = "Subject"
 
 [Results_Settings]
-facet_limit        = 30     ; how many values should we show for each facet?
+; By default, how many values should we show for each facet? (-1 for no limit)
+facet_limit = 30
+; Override facet_limit on a per-field basis using this array:
+;facet_limit_by_field[category] = 50
 ; Should we show "exclude" links for some or all of the facets? Set to * for
 ; all facets, use a comma-separated list to show for some of the facets, set
 ; to false or omit to disable "exclude" links