Merge pull request #5799 from rgacogne/rec-shadow-variables

Fix shadowed variables

diff --cc pdns/dnsdist.cc
Simple merge

diff --cc pdns/pdns_recursor.cc
Simple merge

diff --cc pdns/recursordist/test-syncres_cc.cc
Simple merge

diff --cc pdns/syncres.cc
Simple merge

diff --cc pdns/test-dnsname_cc.cc
Simple merge