Conver: fixed treating checker/ directory the same as check/; Sandbox: allowed previously forbidden syscalls on stdin, stdout and stderr file descriptors if it is was closed according to the Options arguments;
Conver: fixed treating checker/ directory the same as check/;
Sandbox: allowed previously forbidden syscalls on stdin, stdout and stderr file descriptors if it is was closed according to the Options arguments;

varqox/sim,varqox/sim,varqox/sim,varqox/sim