.xql-file reform of acs-tcl (part 1) - remove sql statements from the code, where these are provided via .xql - prefer empty sql statements over various forms of *SQL*
- Use global variables to reduce lock contention on busy sites: * $::acs::default_database replaces [nsv_get db_default_database .] * $::acs::known_database_types replaces [nsv_get ad_known_database_types .] - Cache db_driverkey per-thread (variable ::acs::db_driverkey($dbn)) to reduce high number of locks