boolean safe_cli_execute(string cmd) {
   boolean res;
   try{ cli_execute(cmd);res = true; }
   finally{ return res; } return res;
}
string safe_visit_url(string url, boolean post, boolean encoded) { 
   string res; 
   try { res = visit_url(url,post,encoded); } 
   finally { return res; } return res; 
}
string safe_visit_url(string url, boolean post) { return safe_visit_url(url,post,false); }
string safe_visit_url(string url) { return safe_visit_url(url,true,false); }zlib's check_version() should always print to the cli the first time a script runs each day;
