rem: chopt->dereference = DEREF_NEVER; chopt->recurse = 0; chopt->force_silent = 0;
add: chopt->root_dev_ino = NULL; chopt->affect_symlink_referent = true; chopt->recurse = false; chopt->force_silent = false;
context: chopt_init (struct Chown_option *chopt){  chopt->verbosity = V_off;  chopt->dereference = DEREF_NEVER;  chopt->recurse = 0;  chopt->force_silent = 0;  chopt->user_name = 0;  chopt->group_name = 0;}