catopt
catopt(&options, globopt);
catopt(&optb, options);
catopt(&optb, extra);
catopt(&e->options, newoptions);
static void catopt(char **, const char *);
catopt(&options, optarg);
static void catopt(char **, const char *);
catopt(&options, optarg);
catopt(&optbuf, mntopts);
catopt(&optbuf, options);
catopt(&optbuf, "rw");
catopt(&optbuf, "force");
catopt(&optbuf, "ro");
catopt(&optbuf, "rw");
catopt(&optbuf, "update");
static void catopt(char **, const char *);