Merge pull request #6737 from chbruyand/dnsdist-consistent-hashing

dnsdist: add consistent hash builtin policy

diff --cc pdns/dnsdist-console.cc
Simple merge

diff --cc pdns/dnsdist-lua-bindings.cc
Simple merge

diff --cc pdns/dnsdist-lua.cc
Simple merge

diff --cc pdns/dnsdist.cc
Simple merge

diff --cc pdns/dnsdist.hh
Simple merge

diff --cc pdns/dnsdistdist/docs/reference/config.rst
Simple merge