-before competition
-~~~~~~~~~~~~~~~~~~
-uninstall telnetd
-clean /tmp + /var/tmp and check permissions
-reset owners of com-day* and com-all to avoid quota problems
+TomGav
+~~~~~~
+recursive try-ln for dir input
+clean and well-defined expansion (beware of per-test re-expansion)
+configurable names of in/out files (independent of $PROBLEM)
+paranoidly check file mode/owner before running the sandbox