Merge pull request #9464 from zeha/zonecache

auth: cache list of all domains

diff --cc docs/settings.rst
Simple merge

diff --cc modules/bindbackend/bindbackend2.cc
Simple merge

diff --cc modules/lmdbbackend/lmdbbackend.cc
Simple merge

diff --cc pdns/backends/gsql/gsqlbackend.cc
Simple merge

diff --cc pdns/common_startup.cc
Simple merge

diff --cc pdns/pdnsutil.cc
Simple merge

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