Vendor-remediation fails to fix sysctl_kernel_ipv6_disable rule

[ferricoxide]

Vendor-STIG contents prescribe:

To disable support for (ipv6) add the following line to /etc/sysctl.d/ipv6.conf (or another file in /etc/sysctl.d):

net.ipv6.conf.all.disable_ipv6 = 1

This disables IPv6 on all network interfaces as other services and system functionality require the IPv6 stack loaded to work.

Running oscap in remediation mode fails to fix this.