more descriptive name for making SECItemMuts
more descriptive name for making SECItemMuts

s/maybe_from_vec/maybe_from_empty_preallocated_vec/
Also, maybe_from_empty_preallocated_vec should check the vec's capacity for
being longer than u32::max_value(), not its length.

franziskuskiefer/cose-rust,franziskuskiefer/cose-rust