message: All BSD:s have abi::__cxa_demangle in cxxabi.h
diff: #include "caf/config.hpp"
  -#if defined(CAF_LINUX) || defined(CAF_MACOS) || defined(CAF_NET_BSD)
  +#if defined(CAF_LINUX) || defined(CAF_MACOS) || defined(CAF_BSD)
  # define CAF_HAS_CXX_ABI
  #endif
  