Loki errors' log
After writing down some stupid things on Loki page, SWI-Prolog throws a lot of errors into the log file.
By default it was an apache error.log. Currently they are redirected to /dev/null, but it is not a solution.
Errors appears e.g. on man predicate in Loki tutorial / tests?
TODO: Loki logs should go to the dedicated directory; maybe there should be a file for each prolog process?
Code is inside syntax.php and utl/loki_utl.php files (search for lines with /dev/null)