message: sandbox: add copy_file_range to allowed filesystem syscalls
diff: @@ -539,6 +539,7 @@ public:
  allowed_syscalls.insert(__NR_access); // check user's permissions for a file
  allowed_syscalls.insert(__NR_chdir); // change working directory
  allowed_syscalls.insert(__NR_chmod); // change permissions of a file
  + allowed_syscalls.insert(__NR_copy_file_range); // copy a range of data from one file to another
  allowed_syscalls.insert(__NR_fallocate); // manipulate file space
  allowed_syscalls.insert(__NR_fchmod); // change permissions of a file
  allowed_syscalls.insert(__NR_fchown); // change ownership of a file
  