lscf_addpropvalue
extern int lscf_addpropvalue(const char *, const char *, const char *);
lscf_addpropvalue($2, NULL, $3);
(void) lscf_addpropvalue($2, $3, $4);
ret = lscf_addpropvalue(prop, "astring:", pattern);
(void) lscf_addpropvalue(pname, "boolean:", "0");
(void) lscf_addpropvalue(pname, "astring:", mfile->str);