User Guide, Internationalization fixes

[Nellis, Kenneth]

In the User Guide section on Internationalization [1],
in the "List of supported character sets", it says:
Especially in case of the "CPxxx" style charsets, always 
use them with the trailing "CP".

Instead of "trailing", it should say "leading".

Another editing fix that could be made on the same page in 
the last bullet of the "How to set the locale" section is 
to remove the extraneous "i" at the end of the sentence:
... a better workaround is to use always the UTF-8 
character set.i

[1] http://cygwin.com/cygwin-ug-net/setup-locale.html

--Ken Nellis