I have options inet6 in /etc/resolv.conf, but few programs,
for example links webbrowser, have problem using ipv6-mapped ipv4
addresses. So In meantime of fixing such problems, i would
like to have inet6 disabled for such programs. I was thinking
that export RES_OPTIONS="" will fix this, but apperently
it do not. It looks that there is no way disabling
options which are already enabled in /etc/resolv.conf,
using just RES_OPTIONS variable.