#2 dictl and iconv: supply -c switch

[Michael Bunk]

The -c switch to iconv, will make it skip characters
that cannot be represented in the destination charset
instead of giving an error.

This patch also changes the manpage accordingly and
fixes some typos.

[Aleksey Cheusov]

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fixed in CVS, thanks.

P.S.
'iconv -c' appeared in GNU libc 2.3
while other OSes/libc had it for a long time.