Bug 932: Redisable 0x80...0x9F mappings in some charsets.
Bug 932 is about ELinks letting control characters 0x80...0x9F through
to the terminal. It did not occur with ISO 8859-1, 8859-2, 8859-15,
or 8859-16, because the ELinks mappings for those charsets did not
include those bytes. However, the www.unicode.org versions imported
in the previous commit do include the problematic bytes.
To avoid a possible regression before the ELinks 0.12.0 release,
comment those control-character mappings out again. This workaround
should be reverted after bug 932 has been fixed properly.