There is no sec_read_security in ATS code, i recommend to test it
standalone without ACS first.
After you install it as a module into modules/tcl/ats and load
it in the nsd.tcl section
ns_section "ns/server/${server}/modules"
ns_param ats Tcl
every request that ends with .acs will be handled by ATS.
Not all demos will work, because some of them for Oracle, i didn't
modify all demos.