Hi All,
I've just committed a change that allows users with the permission key
'ipblock-exempt' to be exempted from ALL forms of IP blocks, including those
which come from DNSBLs.
This permission is by default assigned to the Sysop group, although it can
be, as usual, applied to any group using $wgGroupPermissions.
(See bug 3706 and r18904)
Take care,
Andrew Garrett
(Werdna)