Merge pull request #9016 from omoerbeek/random-engine

random engine to allow for future ++17 compatibility

diff --cc pdns/Makefile.am
Simple merge

diff --cc pdns/misc.cc
Simple merge

diff --cc pdns/misc.hh
Simple merge

diff --cc pdns/pdns_recursor.cc
Simple merge

diff --cc pdns/slavecommunicator.cc
Simple merge

diff --cc pdns/syncres.cc
Simple merge

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