Snippets for maildrop 4.0.4 from FreeBSD 150arm64

Sourced from https://pkg-status.freebsd.org/ampere5/data/latest-per-pkg/maildrop/4.0.4/150arm64-default.log.

./rfc2045.h:291:16: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
  291 |         char name_buf[name.size()+1];
      |                       ^~~~~~~~~~~~~

./rfc2045.h:430:17: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
  430 |         char value_buf[value.size()+3];
      |                        ^~~~~~~~~~~~~~

./rfc2045.h:1154:1: warning: 'entity_parse_meta' defined as a struct here but previously declared as a class; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
 1154 | struct rfc2045::entity_parse_meta {
      | ^

./rfc2045.h:2683:1: warning: 'headers_base' defined as a struct here but previously declared as a class; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
 2683 | struct rfc2045::headers_base {
      | ^

../rfc2045/rfc2045.h:291:16: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
  291 |         char name_buf[name.size()+1];
      |                       ^~~~~~~~~~~~~

../rfc2045/rfc2045.h:430:17: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
  430 |         char value_buf[value.size()+3];
      |                        ^~~~~~~~~~~~~~

../rfc2045/rfc2045.h:1154:1: warning: 'entity_parse_meta' defined as a struct here but previously declared as a class; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
 1154 | struct rfc2045::entity_parse_meta {
      | ^

../rfc2045/rfc2045.h:2683:1: warning: 'headers_base' defined as a struct here but previously declared as a class; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
 2683 | struct rfc2045::headers_base {
      | ^