Merge pull request #10287 from xiaolong-666/master

rec: remove delegation only (issue #7544)

diff --cc pdns/pdns_recursor.cc
Simple merge

diff --cc pdns/rec_channel_rec.cc
Simple merge

diff --cc pdns/syncres.cc
Simple merge

diff --cc pdns/syncres.hh
Simple merge

diff --cc pdns/ws-recursor.cc
Simple merge