message: [addrman] Change CAddrInfo access
  Since knowledge of CAddrInfo is limited to callsites that import
  addrman_impl.h, only objects in addrman.cpp or the tests have access. Thus we
  can remove calling them friends and make the members public.
diff: @@ -17,7 +17,6 @@ public:
  //! last counted attempt (memory only)
  int64_t nLastCountAttempt{0};
  -private:
  //! where knowledge about this address first came from
  CNetAddr source;
  @@ -36,11 +35,6 @@ private:
  //! position in vRandom
  mutable int nRandomPos{-1};
  - friend class AddrManImpl;
  - friend class CAddrManDeterministic;
  -
  -public:
  -
  SERIALIZE_METHODS(CAddrInfo, obj)
  {
  READWRITEAS(CAddress, obj);
  