dnspq: don't build main unless explicitly requested
readconfig: fix randomisation wrt first entry

Since we would only append entries after existing ones, the first entry
for a group read would never be repositioned, e.g. the first entry from
the group would always be the first, and hence would always receive more
traffic.  We now prepend if our randomisation tells us to to fix this
problem.
Makefile: fix after changing standalone
version bump