document the config cli tool

util/config.md

@@ -0,0 +1,26 @@
+CLI config utility
+==================
+
+Usage:
+
+
+config
+	displays all config entries
+
+
+config family
+	displays all config entries for family (system, database, etc)
+
+
+config family key
+	displays single config entry for specified family and key
+
+config family key value
+	set config entry for specified family and key to value and display result
+
+
+
+Notes:
+	Setting config entries which are manually set in .htconfig.php may result in 
+conflict between database settings and the manual startup settings. 
+