Description: vt: Disable KD_FONT_OP_COPY
References:
 https://www.openwall.com/lists/oss-security/2020/11/09/2
Notes:
 carnil> Fixed as well in 5.9.7
Bugs:
upstream: released (5.10-rc3) [3c4e0dff2095c579b142d5a0693257f1c58b4804]
4.19-upstream-stable: released (4.19.156) [6612b754ac0c85ca8b1181b5d3ea4461a8c1bbcb]
4.9-upstream-stable: released (4.9.242) [5ca7f073e680ff2e56756a9b6bffcd55085d292c]
sid: released (5.9.9-1)
4.19-buster-security: released (4.19.160-1)
4.9-stretch-security: released (4.9.246-1)