strlist_append
strlist_append(&sl, &slsize, cp);
strlist_append(&sl, &slsize, cp);
strlist_append(&sl, &slsize, compatible);
strlist_append(&sl, &slsize,
assert(strlist_append(&newsl, &newslsize, "zero"));
assert(strlist_append(&newsl, &newslsize, "one"));
assert(strlist_append(&newsl, &newslsize, "two"));
assert(strlist_append(&newsl, &newslsize, "three"));
assert(strlist_append(&newsl, &newslsize, "four"));
assert(strlist_append(&newsl, &newslsize, "five"));
bool strlist_append(char **, size_t *, const char *);