strpbrk, strspn, and strcspn optimization suggestion

[Hrvoje Niksic]

Hrvoje Niksic <hniksic@xemacs.org> writes:

> I stumbled upon an article that describes a fast strspn/strcspn
> implementation that would also apply to strpbrk and strtok/strtok_r:
[...]

In case it wasn't obvious from the first message, I intend to write a
patch for the proposed optimization, as long as there is any chance of
it being accepted.