Fallback to 'util_current_location' when 'ad_url' returns an empty string, such in cases when the SystemUrl is not set, on the xml_rpc_validate testcase
Fallback to 'util_current_location' when 'ad_url' returns an empty string, such in cases when the SystemUrl is not set, on the util_http_json_encoding testcase
- set sanitize on logfile writer per default to 0- change cleanup interval from 1h to 71min, since on the hour interval, there are already many things going on in OpenACS
