[build2] Boost package

[Bo Lorentsen]

Hi ...

I am sure I am not the first to ask, but have anyone tried to make a 
boost package (set) ?

I can see that some of the conan people have tried to modulize boost for 
conan, and maybe build2 could benefit from some of that work ?

Is this a problem related to the header (and c++-20 module) only package 
handling, that is yet not quite possible (except for a dummy stub) ?

/BL