If client machines should use a URL such as http://pac.example.com/pacfile.pac, then create a redirect to the accelerated PAC file found at http://192.168.1.1:8080/accelerated_pac_base.pac
To modify the PAC file URL:
<Proxy>
url.domain=//pac.example.com/pacfile.pac action.pac_redirect(yes)
define action pac_redirect
redirect( 302, ".*", "http://192.168.1.1:8080/accelerated_pac_base.pac" )
end