one of the documented procedures in this installation of the ACS
ad_parameter_section   { subsection "" }
What it does:
Returns all the vars in a parameter section as an ns_set. Relies on undocumented AOLserver Tcl API call ns_configsection (analogous C API call is documented). Differs from the API call in that it returns an empty ns_set if the parameter section does not exist.
Defined in: /web/philip/packages/acs-core/defs-procs.tcl

Source code:

    set server_name [ns_info server]
    append config_path "ns/server/" $server_name "/acs"
    if ![empty_string_p $subsection] {
	append config_path "/$subsection"
    set what_aolserver_gave_us [ns_configsection $config_path]
    if [empty_string_p $what_aolserver_gave_us] {
	return [ns_set new "empty set for config section"]
    } else {
	return $what_aolserver_gave_us