addoption
addoption(optarg);
static void addoption(char *);
void addoption(const char *, const char *);
WORD { addoption($1, NULL); }
| WORD '=' value { addoption($1, $3); }
addoption(intern("MAXUSERS"), intern(str));
addoption(name, intern(nv->nv_str));
(void)addoption(intern("GPROF"), NULL);
addoption(nv->nv_name, NULL);