armscii-8.7, cp1251.7, iso_8859-1.7, iso_8859-10.7, iso_8859-11.7, iso_8859-13.7...

armscii-8.7, cp1251.7, iso_8859-1.7, iso_8859-10.7, iso_8859-11.7, iso_8859-13.7, iso_8859-14.7, iso_8859-15.7, iso_8859-16.7, iso_8859-2.7, iso_8859-3.7, iso_8859-4.7, iso_8859-5.7, iso_8859-6.7, iso_8859-7.7, iso_8859-8.7, iso_8859-9.7, koi8-r.7, koi8-u.7: Convert pages contain non-ASCII to use UTF-8

Done using Peter Schiffer's convert_to_utf_8.sh script.
These pages containing non-ASCII in the rendered characters, and
so the script inserts a "coding:" marker into the groff source.

See https://bugzilla.kernel.org/show_bug.cgi?id=60807

Reported-by: Weizhou Pan <cs.wzpan@gmail.com>
Co-written-by: Peter Schiffer <pschiffe@redhat.com
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>