Merge pull request #8580 from omoerbeek/thread_rwlock_destroy

pthread_rwlock_init() should be matched by pthread_rwlock_destroy()

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

diff --cc pdns/auth-packetcache.hh
Simple merge

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

diff --cc pdns/auth-querycache.hh
Simple merge

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