Merge pull request #9275 from Nuitari/AlwaysReconnectOnComingBackUp

dnsdist: Force a reconnection when a downstream transitions to the UP state

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

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

diff --cc pdns/dnsdist.hh
Simple merge

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