firewall: config: remove restictions on DHCPv6 allow rule
Remove restrictions on source and destination addresses, which aren't
specified on RFC8415, and for some reason in openwrt are configured
to allow both link-local and ULA addresses.
As cleared out in issue #5066 there are some ISPs that use Gloabal
Unicast addresses, so fix this rule to allow them.
Fixes: #5066
Signed-off-by: Tiago Gaspar <[email protected]>
[rebase onto firewall3, clarify subject, bump PKG_RELEASE]
Signed-off-by: Jo-Philipp Wich <[email protected]>
Tiago Gaspar