Remove fixme but list the outstanding bugs

The original bug was fixed but while testing for another PR it shows that getopt doesn't parse options in the normal POSIX expected way.

Author: Michael Vasseur

judge/judgedaemon.main.php

@@ -488,7 +488,8 @@ function fetch_executable_internal(
 }
 
 $options = getopt("dv:n:hVe:j:t:", ["diskspace-error"]);
-// FIXME: getopt doesn't return FALSE on parse failure as documented!
+// We can't fully trust the output of getopt, it has outstanding bugs:
+// https://bugs.php.net/search.php?cmd=display&search_for=getopt&x=0&y=0
 if ($options===false) {
     echo "Error: parsing options failed.\n";
     usage();