Merge pull request #15874 from rgacogne/ddist-get-current-runtime-config-optimization

dnsdist: Only check the freshness of the configuration when needed

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

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

diff --cc pdns/dnsdistdist/dnsdist-snmp.cc
Simple merge

diff --cc pdns/dnsdistdist/dnsdist-web.cc
Simple merge

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

diff --cc pdns/dnsdistdist/doh.cc
Simple merge