Assorted spelling fixes.

[Julian Rüger]

Hi Francois,

> -        /* if we set the bufferpointer to NULL here UrlUnescape  fails and string gets not converted */
> +        /* if we set the buffer pointer to NULL here UrlUnescape fails and the string is not converted */ 

for consistency with the other buffer pointer comments and better
readability, I suggest you add a comma here:

+        /* if we set the buffer pointer to NULL here, UrlUnescape fails and the string is not converted */

Best regards,
Julian