Merge pull request #6495 from Habbie/parse-resolvconf-once

only parse resolv.conf once - this avoids race conditions

diff --cc pdns/lua-auth4.cc
index d65d28862f892a54d5bcc8278289ac660cea849d,a028d62f7f53c2e400f94edba96aa5f69b4c997d..dae104b14032b784aa4c6f6782cf235bccbf7312
--- 1/pdns/lua-auth4.cc
--- 2/pdns/lua-auth4.cc
+++ b/pdns/lua-auth4.cc
@@@ -37,14 -27,9 +37,12 @@@ void AuthLua4::postLoad(
  
  #else
  
 -#include "ext/luawrapper/include/LuaContext.hpp"
 +LuaContext* AuthLua4::getLua()
 +{
 +  return d_lw.get();
 +}
  
  void AuthLua4::postPrepareContext() {
-   stubParseResolveConf();
- 
    d_lw->writeFunction("resolve", [](const std::string& qname, uint16_t qtype) {
        std::vector<DNSZoneRecord> ret;
        std::unordered_map<int, DNSResourceRecord> luaResult;

diff --cc pdns/stubresolver.cc
Simple merge