Fix charset handling for --key-password on command line
Fix charset handling for --key-password on command line

It was always converting to UTF-8 for input from the terminal; there
was a plausible reason for using the legacy charset as-is but it's
better to be consistent.

Signed-off-by: David Woodhouse <97b3379caa91f4ee97e44013ae4dc6350540fa9d@infradead.org>

mtmiller/openconnect,mtmiller/openconnect,cernekee/openconnect,brandt/openconnect,brandt/openconnect,brandt/openconnect,mtmiller/openconnect,cernekee/openconnect,brandt/openconnect,mtmiller/openconnect,cernekee/openconnect,cernekee/openconnect