[PATCH 3/3] chcp: Set the global codepage when called with an argument.

[Erich E. Hoover]

MSDN does not seem to explicitly say anywhere what happens when
setting the "active" code page, but several other sources online state
that it sets both the input and output console code page (whereas
graftabl sets just the output console code page).  This patch adds
that functionality so that applications that expect to be able to
change the "active" console code page can do so.

Best,
Erich