* build: boost, prevent use of std::unary_function

For Boost 1.72 we should use -D_HAS_AUTO_PTR_ETC=0, for newer versions
-DBOOST_NO_CXX98_FUNCTION_BASE.

- boostorg/container_hash@fd310d2
- boostorg/functional@6a573e4
- bitcoin/bitcoin@880d4aa
- bitcoin/bitcoin@d4c59da
- DeckerSU/KomodoOcean@0742048

This will remove warnings like the one shown below during build with GCC 13:

```
/home/decker/komodo/depends/x86_64-unknown-linux-gnu/share/../include/boost/container_hash/hash.hpp:130:33: warning: ‘template<class _Arg, class _Result> struct std::unary_function’ is deprecated [-Wdeprecated-declarations]
  130 |         struct hash_base : std::unary_function<T, std::size_t> {};
      |                                 ^~~~~~~~~~~~~~
In file included from /usr/include/c++/13/string:49,
                 from /usr/include/c++/13/bits/locale_classes.h:40,
                 from /usr/include/c++/13/bits/ios_base.h:41,
                 from /usr/include/c++/13/ios:44,
                 from /usr/include/c++/13/ostream:40,
                 from /home/decker/komodo/depends/x86_64-unknown-linux-gnu/share/../include/gtest/gtest.h:55,
                 from test-komodo/test_legacy_events.cpp:1:
/usr/include/c++/13/bits/stl_function.h:117:12: note: declared here
  117 |     struct unary_function
      |            ^~~~~~~~~~~~~~
```

* build: add BOOST_CPPFLAGS display for configure