Assorted spelling fixes

[Dmitry Timoshkov]

Frédéric Delanoy <frederic.delanoy at gmail.com> wrote:

> -    cab_ULONG window_size;     /* window size (1Kb through 2Mb)           */
> +    cab_ULONG window_size;     /* window size (1 KB through 2 MB)         */

This is not the typos, that's a common way of writing sizes by programmers,
personally I prefer the old form (and will keep using it in future) and hate
the "fixed" variant.

Please avoid this kind of "fixes".

-- 
Dmitry.