Basic: resurcive array search, IO unset fix

Basic: recusrive array search has correct parameter declarations &
checks for null/empty/not string

IO: all unset are removed and null or init to array is used to reset

Update for other include pages with some missing default data

www/configs/config.host.php

@@ -7,8 +7,7 @@
 * - DB access name (array group from config.db)
 * - location (test/stage/live)
 * - debug flag (true/false)
-* - DB path (eg PUBLIC_SCHEMA)
-* - stie lang
+* - site lang
 * HISTORY:
 *********************************************************************/